You are not the only one, every thing was fine a couple of weeks ago, but now I have the same problems can’t drag widgets or edit them, nothing is responding, hope this matter gets resolved shortly.
Have you tried:
– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the Twenty Eleven theme to rule out any theme-specific problems.
– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.
Thanks a lot esmi I deactivated all my plugins as you stated and re-activated them one by one, found one which was causing the problem and actually the rouge plugin I was not using any way.
Thanks again.
