Trying to customize for blessonline

[Deenosaurus]

Hello there, I would love if someone could help me with customizing the raidplaner for the upcoming game bless online. I got the following errormessage when clicking on the calendar:

Eine Anfrage hat einen Fehler gemeldet.

PHP Error 8 in file message_query_calendar.php(213):\nUndefined offset: 2\n\nCallstack:\ndebug.php(46) : root\n

I've already tried everything I guessed it caused the error.

At first I gonna attach the theme file, if you need anything else, just say so.

Thanks!

<?xml version="1.0" encoding="UTF-8"?>
<game>
    <id>bles</id>
    <name>Bless Online</name>
    <family>blessonline</family>
    <classmode>multi</classmode>
    
    <roles>
        <role id="tnk" loca="Tank" style="role_tank"/>
        <role id="off" loca="Offtank" style="role_Support"/>
        <role id="med" loca="Healer" style="role_heal"/>
        <role id="atk" loca="Melee"  style="role_melee"/>
        <role id="rgd" loca="Range"  style="role_range"/>
    </roles>
    
    <classes>
        <class id="rgr" loca="Ranger" style="ranger">
            <role id="rgd"/>
        </class>
        
        <class id="mge" loca="Mage" style="mage">
            <role id="rgd"/>
        </class>
		
        <class id="pal" loca="Paladin" style="paladin">
            <role id="med" default="true"/>
            <role id="off"/>
        </class>
		
        <class id="grd" loca="Guardian" style="guardian">
            <role id="tnk"/>
        </class>
		
        <class id="bsk" loca="Berserker" style="berserker">
            <role id="atk" default="true"/>
            <role id="off"/>
        </class>
    </classes>
    
    <raidview>
        <slots role="tnk" order="1" columns="1"/>
        <slots role="off" order="2" columns="*"/>
        <slots role="med" order="3" columns="1"/>
        <slots role="atk" order="4" columns="*"/>
        <slots role="rgd" order="5" columns="*"/>
    </raidview>
    
    <groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
            <role id="rgd" count="*"/>
        </group>
    </groups>
	<groups>
        <group count="5">
            <role id="tnk" count="1"/>
            <role id="off" count="*"/>
            <role id="med" count="1"/>
            <role id="atk" count="*"/>
	    <role id="rgd" count="*"/>
        </group>
    </groups>
    
    <locale name="en">
        <text key="Ranger">Ranger</text>
        <text key="Mage">Mage</text>
        <text key="Paladin">Paladin</text>
        <text key="Guardian">Guardian</text>
        <text key="Berserker">Berserker</text>
    </locale>
    
    <locale name="de">
        <text key="Ranger">Waldläufer</text>
        <text key="Mage">Magier</text>
        <text key="Paladin">Paladin</text>
        <text key="Guardian">Wächter</text>
        <text key="Berserker">Berserker</text>
    </locale>
       
    <locale name="pl">
        <text key="Ranger">Łowca</text>
        <text key="Mage">Magik</text>
        <text key="Paladin">Paladyn</text>
        <text key="Guardian">Strażnik</text>
        <text key="Berserker">Berserker</text>
    </locale>
    
    <locale name="ru">
        <text key="Ranger">Следопыт</text>
        <text key="Mage">Маг</text>
        <text key="Paladin">Паладин</text>
        <text key="Guardian">Страж</text>
        <text key="Berserker">Берсерк</text>
    </locale>
</game>