Not being able to see the blocks to edit them

Dear, NovaSkin
I had noticed that when I click the block to edit them I don’t see anything it just turns blank; I’ve tried doing stuff for it and it doesn’t seem to work. Respond If you think you might be able to help this will be useful. Thanks

what have you tried?

Press F12 and copy the error log from the console tab here.

I’ve tried clearing cookies, and data. Tried clearing my history. Mostly things like that