Combat Tracker Error

I am playing in a M & M Campaign and every time anything at all is done on the combat tracker an error box pops up. I was hoping to get some help with this.
The GM uses the ultimate edition and I use the standard. I attached 2 screen shots.

Thanks, Troeji

Can you provide more information on what you were doing prior to this coming up? I performed a test with a client performing tasks and rolling initiative and doesn't present that error.

Everything works fine until we use the combat tracker. Anything at all that I or the GM does on the ct makes the box pop up. Advancing the initiative order, Attacking, adding npc's or characters to the ct, anything at all.

Can you attempt to create a new campaign and see if the same error exists? Also provide the steps that were taken prior to the error popping up to help me understand what was done prior to it appearing. This can help in finding the cause and eliminating the bug.