Are you making pirated games available for download?
We'll all take a very dim view of that here...
It seems in one of your templates you have some code which is causing other HTML or javascript to break.
You need to retrace your steps and remove the offending code.
You can use the Search Templates feature to locate the text that is appearing. Then you may want to take a copy of the template before using "Revert Changes" to return the template back to its original state.