In my case, this is not a new installation but an existing production instance.
But you changed the infrastructure : you must first validate that ProjeQtOr supports new infrastructure.
When I migrated from Debian 10 to Debian 12, ProjeQtOr stopped working because the server switched from mod_php to PHP-FPM, and a few required dependencies were no longer present.
It is not Projeqtor that stops working, it is PHP. It is a prerequisite.
NB : if on a working instance you stop PHP, you'll get same result.
On a production server, it’s not really practical to perform a full reinstallation just to access the configuration check that runs during a fresh install.
It takes two minutes to install a new instance on another folder...
That’s why I was wondering — is there any page or tool within an already-installed instance that could run the same checks (similar to /tool/parametersLocation.php) to confirm that all prerequisites and modules are in place?
No, there is no : we check it at first install, not after.
If you change the infrastructure, it is your duty to verify it is compatible with installed softwares.
think having such a configuration check available directly from the administration interface would be a really useful improvement. It would make life easier for administrators after an OS or PHP upgrade, without having to set up a parallel installation just for testing.
There is absolutely no interest : if the new infrastrcuture is not compatible and projeqtor does not work anymore, you will never get to the configuration page.
If you're afraid of compatibility, we propose some great Hosting Service, where you can use projeqtor without bothering with technical aspects : we do it for you.
It is part of our Business Model : if you like our software, think about supporting it.