error room ,GTE emu , und js error ,brauche hilfe.

hi

i have some errors that i whant to fix .

error 1 is the room error that is saved see pic .
error 2 is javascript , dunno what to do .

this is the line of the java error , and i can look at it the whole day but that wont fix it .

=Class.create();TagHelper.initialized=false;TagHelper.init=function(a){if(TagHelper.initialized){return}TagHelper.initialized=true;TagHelper.loggedInAccountId=a;

and heres another error i found

Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\Boost\Packages\Management\Start.php:5) in C:\xampp\htdocs\Boost\Packages\Management\Start.php on line 5

and this is the line

<?php header('Content-Type: text/html; charset=ISO-8859-1'); ?>

if some 1 wil help me out i wil aprociate that .

and what about the js error how can i fix that 1 ?

and what about the php header error ?

ok wil figirure it out , i didnt change those things , i downloaded this whit those instals
can you maybe help me out whit the js and room error ?

dont know what to do .

and how is it possible if i change furni language to dutch and when im done then something changed it to another englisch name back ?

is there another furnitxt some where or what ?