I can not edit my blocks

I can not edit my blocks. It was working a while ago and then I could not edit it all of a sudden. I can nit grab the block or add any block.

Are you getting any errors or so?

I think this is the error. So still i can not edit it

Do you need new batteries in your mouse?

No, my mouse is ok

Try restarting your computer, then try again

Taifun