Hello, i am trying to make an rpg style adventure but i'm struggling with even getting the character creation to start.
Every time i go to play, it has this:

You are in a room.
Error running script: Unable to cast object of type 'TextAdventures.Quest.Element' to type 'System.String'.

heres the code:

 <!--Saved by Quest 5.7.6404.15496-->
<asl version="550">
  <include ref="English.aslx" />
  <include ref="Core.aslx" />
  <game name="Wish Fur More">
    <gameid>6fee891e-7d0c-44a3-878e-eabe2c84f2a0</gameid>
    <version>1.0</version>
    <firstpublished>2017</firstpublished>
    <cover>small tiz gift.png</cover>
    <start type="script">
    </start>
    <povstatusattributes type="stringdictionary" />
    <pov type="object">player</pov>
    <gridmap type="boolean">false</gridmap>
    <statusandcompassattop type="boolean">false</statusandcompassattop>
    <customstatuspane type="boolean">false</customstatuspane>
    <commandpane type="boolean">false</commandpane>
    <roomenter type="script">
      characterselect
    </roomenter>
    <showpanes type="boolean">false</showpanes>
    <showhealth />
  </game>
  <object name="room">
    <inherit name="editor_room" />
    <dropdestination type="object">room</dropdestination>
    <object name="player">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
    </object>
  </object>
  <object name="Characters">
    <inherit name="editor_room" />
    <object name="Mage">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
      <inherit name="characterclass" />
      <feature_player />
      <class>Mage</class>
      <maxhealth type="int">20</maxhealth>
      <health type="int">10</health>
      <statusattributes type="stringdictionary">
        <item>
          <key>HP</key>
          <value></value>
        </item>
        <item>
          <key>Armor</key>
          <value></value>
        </item>
        <item>
          <key>STR</key>
          <value></value>
        </item>
        <item>
          <key>DEX</key>
          <value></value>
        </item>
        <item>
          <key>INT</key>
          <value></value>
        </item>
        <item>
          <key>Equipment</key>
          <value></value>
        </item>
      </statusattributes>
      <Equipment type="object">Staff</Equipment>
    </object>
    <object name="Rogue">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
      <inherit name="characterclass" />
      <feature_player />
      <class>Rogue</class>
      <maxhealth type="int">25</maxhealth>
      <health type="int">20</health>
      <statusattributes type="stringdictionary">
        <item>
          <key>HP</key>
          <value></value>
        </item>
        <item>
          <key>Armor</key>
          <value></value>
        </item>
        <item>
          <key>STR</key>
          <value></value>
        </item>
        <item>
          <key>DEX</key>
          <value></value>
        </item>
        <item>
          <key>INT</key>
          <value></value>
        </item>
        <item>
          <key>Equipment</key>
          <value></value>
        </item>
      </statusattributes>
      <Equipment type="object">Dagger</Equipment>
    </object>
    <object name="Ranger">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
      <inherit name="characterclass" />
      <feature_player />
      <class>Ranger</class>
      <maxhealth type="int">30</maxhealth>
      <health type="int">25</health>
      <statusattributes type="stringdictionary">
        <item>
          <key>HP</key>
          <value></value>
        </item>
        <item>
          <key>Armor</key>
          <value></value>
        </item>
        <item>
          <key>STR</key>
          <value></value>
        </item>
        <item>
          <key>DEX</key>
          <value></value>
        </item>
        <item>
          <key>INT</key>
          <value></value>
        </item>
        <item>
          <key>Equipment</key>
          <value></value>
        </item>
      </statusattributes>
      <Equipment type="object">Bow</Equipment>
    </object>
    <object name="Fighter">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
      <inherit name="characterclass" />
      <feature_player />
      <class>Fighter</class>
      <maxhealth type="int">40</maxhealth>
      <health type="int">30</health>
      <statusattributes type="stringdictionary">
        <item>
          <key>HP</key>
          <value></value>
        </item>
        <item>
          <key>Armor</key>
          <value></value>
        </item>
        <item>
          <key>STR</key>
          <value></value>
        </item>
        <item>
          <key>DEX</key>
          <value></value>
        </item>
        <item>
          <key>INT</key>
          <value></value>
        </item>
        <item>
          <key>Equipment</key>
          <value></value>
        </item>
      </statusattributes>
      <Equipment type="object">Sword</Equipment>
    </object>
    <object name="Healer">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
      <inherit name="characterclass" />
      <feature_player />
      <class>Healer</class>
      <maxhealth type="int">15</maxhealth>
      <health type="int">10</health>
      <statusattributes type="stringdictionary">
        <item>
          <key>HP</key>
          <value></value>
        </item>
        <item>
          <key>Armor</key>
          <value></value>
        </item>
        <item>
          <key>STR</key>
          <value></value>
        </item>
        <item>
          <key>DEX</key>
          <value></value>
        </item>
        <item>
          <key>INT</key>
          <value></value>
        </item>
        <item>
          <key>Equipment</key>
          <value></value>
        </item>
      </statusattributes>
      <visible type="boolean">false</visible>
      <Equipment type="object">Talisman</Equipment>
    </object>
  </object>
  <object name="Weapons">
    <inherit name="editor_room" />
    <object name="Sword">
      <inherit name="editor_object" />
      <inherit name="weapontype" />
    </object>
    <object name="Staff">
      <inherit name="editor_object" />
      <inherit name="weapontype" />
    </object>
    <object name="Dagger">
      <inherit name="editor_object" />
      <inherit name="weapontype" />
    </object>
    <object name="Bow">
      <inherit name="editor_object" />
      <inherit name="weapontype" />
    </object>
    <object name="Talisman">
      <inherit name="editor_object" />
      <inherit name="weapontype" />
      <inherit name="healthitem" />
    </object>
  </object>
  <object name="Basic_Items">
    <inherit name="editor_room" />
  </object>
  <object name="Health_Items">
    <inherit name="editor_room" />
    <object name="potion_L_cure">
      <inherit name="editor_object" />
      <inherit name="healthitem" />
    </object>
    <object name="potion_M_cure">
      <inherit name="editor_object" />
      <inherit name="healthitem" />
    </object>
    <object name="potion_C_cure">
      <inherit name="editor_object" />
      <inherit name="healthitem" />
    </object>
  </object>
  <object name="Armor">
    <inherit name="editor_room" />
    <object name="robes">
      <inherit name="editor_object" />
      <inherit name="armortype" />
    </object>
    <object name="leather">
      <inherit name="editor_object" />
      <inherit name="armortype" />
    </object>
    <object name="lightchainmail">
      <inherit name="editor_object" />
      <inherit name="armortype" />
      <scenery />
    </object>
    <object name="heavyplatemail">
      <inherit name="editor_object" />
      <inherit name="armortype" />
      <scenery />
    </object>
  </object>
  <object name="Dark Cell">
    <inherit name="editor_room" />
  </object>
  <object name="Character Setup">
    <inherit name="editor_room" />
  </object>
  <type name="characterclass">
    <HP type="string"></HP>
    <Armor type="int">0</Armor>
    <STR type="int">0</STR>
    <DEX type="int">0</DEX>
    <INT type="int">0</INT>
    <health type="int">0</health>
    <maxhealth type="int">0</maxhealth>
    <class type="string"></class>
    <points type="int">10</points>
    <Libido type="int">0</Libido>
    <Equipment type="object">player</Equipment>
  </type>
  <type name="weapontype" />
  <type name="healthitem" />
  <type name="armortype" />
  <type name="itemdata" />
  <function name="characterselect"><![CDATA[
    charactermenu = NewStringList()
    list add (charactermenu, Mage)
    list add (charactermenu, Rogue)
    list add (charactermenu, Ranger)
    list add (charactermenu, Fighter)
    list add (charactermenu, Healer)
    ShowMenu ("Select Character", charactermenu, true) {
      char = "result"
      msg ("You Choose "+char+".")
      if (result <> null) {
        if (char ="Mage") {
          Ask ("So you are a \"+char+\"") {
            if (result = True) {
              ChangePOV (Mage)
              ClearScreen
              MoveObject (game pov, Character_Setup)
              game.pov.hp = ""+game.pov.health+ " / " +game.pov.maxhealth+ ""
              namingcharacter
            }
            else if (result = False) {
              characterselect
            }
          }
        }
        else if (char ="Rogue") {
          Ask ("So you are a \"+char+\"") {
            if (result = True) {
              ChangePOV (Mage)
              ClearScreen
              MoveObject (game pov, Character_Setup)
              game.pov.hp = ""+game.pov.health+ " / " +game.pov.maxhealth+ ""
              namingcharacter
            }
            else if (result = False) {
              characterselect
            }
          }
        }
        else if (char ="Ranger") {
          Ask ("So you are a \"+char+\"") {
            if (result = True) {
              ChangePOV (Mage)
              ClearScreen
              MoveObject (game pov, Character_Setup)
              game.pov.hp = ""+game.pov.health+ " / " +game.pov.maxhealth+ ""
              namingcharacter
            }
            else if (result = False) {
              characterselect
            }
          }
        }
        else if (char ="Fighter") {
          Ask ("So you are a \"+char+\"") {
            if (result = True) {
              ChangePOV (Mage)
              ClearScreen
              MoveObject (game pov, Character_Setup)
              game.pov.hp = ""+game.pov.health+ " / " +game.pov.maxhealth+ ""
              namingcharacter
            }
            else if (result = False) {
              characterselect
            }
          }
        }
        else if (char ="Healer") {
          Ask ("So you are a \"+char+\"") {
            if (result = True) {
              ChangePOV (Mage)
              ClearScreen
              MoveObject (game pov, Character_Setup)
              game.pov.hp = ""+game.pov.health+ " / " +game.pov.maxhealth+ ""
              namingcharacter
            }
            else if (result = False) {
              characterselect
            }
          }
        }
      }
      else {
        msg ("You cancled... ")
      }
    }
  ]]></function>
  <function name="namingcharacter">
  </function>
  <function name="choosinggender">
  </function>
  <function name="choosingrace">
  </function>
  <function name="assignpoints">
  </function>
</asl>   

  charactermenu = NewStringList()
    list add (charactermenu, Mage)
    list add (charactermenu, Rogue)
    list add (charactermenu, Ranger)
    list add (charactermenu, Fighter)
    list add (charactermenu, Healer)

charactermenu is a string list but you are trying to add objects to it. Try

  charactermenu = NewStringList()
    list add (charactermenu, "Mage")
    list add (charactermenu, "Rogue")
    list add (charactermenu, "Ranger")
    list add (charactermenu, "Fighter")
    list add (charactermenu, "Healer")