I have updated from 3.1.1 to 4.0.1 and after unzipping and overwriting files, I just get a HTTP 500 response on all URLs which I used to open before.
I also can’t access the update page. Just tried to give chmod 755 to all folder and files, but it does not help.
The logs laravel-error and laravel-info don’t show anything new.
Are there any details in the web server error log?
Maybe you need to uncomment this line of code?
https://github.com/invoiceninja/invoiceninja/blob/master/public/.htaccess#L22
Solved it. In case somebody is as stupid as me: I downloaded by mistake from github and thought it’d be the same version as on the website. But in this case it is necessary to run composer install, which I can’t do. So I just took the version from the website and everything is fine now.