Class 'PhpParser\Node\Stmt\ClassConst' not found

[Soheib]

Hello everyone, i need some help please.

So i initially created a backup of my website to copy my site and create one test environnement etcc ... in another domain i had many error but finally it works but only in debug mode when i disable it it gives me a blank page with nothing, also when it works in debug mode the back office works good but the page of module configuration does not work and gives me 

 

I don't really know how to fix it :/

[musicmaster]

look at the stack trace. If somewhere in its list you find a module file you know where the problem is.