manage category on the backend: there has been an error processing your request

[jordan_dabricot]

Hi, 

I've uninstalled a theme from my magento website and on the backend it worked but the catalog/manage category has a problem from my former theme it makes that : 

https://gyazo.com/2217e0a68cf8a74a1469c530d1bbecb7

Is anyone has an idea of what to do to solved this problem please ?

Thank you