Error 500 and FatalThrowableError in PagesDriver.php

[pedro-club]

Hi everyone,
Since yesterday, I get a "Whoops, looks like something went wrong." message for every page in my website.
It returns systematically a 500 error code.
I'm running in Statamic v2, latest version.

It started after updating a post in a collection.

After turning the debug mode to true, I get this message :

FatalThrowableError in PagesDriver.php 
line 86: Call to a member function in() on null

which is this line of code :

$uri = $parent->in($locale)->uri(); 

Every error messages seems to come from Stache folder files. I don't know if that info can help...
All debug is currently visible here.

I replaced the website by a backup version (no error at the time), but I still get the error.
I can't figure out where does this error come from...

Any suggestions ?
Thanks !

[jasonvarga]

Clear your cache and try again. php please clear:cache

[pedro-club]

I get this error :

[Symfony\Component\Debug\Exception\FatalThrowableError]  
Call to a member function in() on null 

[jasonvarga]

Please open a support request and we'll help you there. If you can provide us with a copy of the site that'll be even more helpful. This repo is for Statamic 3+.

https://statamic.com/support