Error in Widget

Hi, I’am Diego.
My theme is Mammoth-Inn
When i try to select “Widget” or “Customized” i have this error:
Exception thrown
String could not be parsed as XML
When i public my Site some time ago i don’t have this message. Now i try to modify and i have this error.
It’s possible something occur becouse of new wordpress release ?

Hello @diegobal63

For specific help regarding the theme (although I saw the theme was deleted meanwhile) you can try to contact the theme author here. Maybe he can guide you in the right direction.

I’ll tag the theme author also here, maybe he sees the post here.