my widgets have stopped saving

hi there, i don't know what i've done but my widgets (profile and admin) aren't saving after refresh, i just added the widget-manager plugin but it had a bug so i took it off, i cleared all my caches and now they are not saving for some reason.

 

i haven't done any mods other than the widget-manger plugin, it was working fine before.

 

help fixing this please :)

 

thank you