Site breaks when activating this

After installation I activated the module and the site broke - white screen saying "The site experience an error." (or similar as I have it running a different language).

I renamed the module folder on the server and the site is working again.
Tried to rename it back to the original name and the site stopped working.

In the log files I can see the following errors listed.
1:
First error message after installation:
Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: You have requested a non-existent service "path.alias_manager". Did you mean this: "path_alias.manager"? i Drupal\Component\DependencyInjection\Container->get() (linje 151 af /var/www/vhosts/norouteexplore.dk/httpdocs/core/lib/Drupal/Component/DependencyInjection/Container.php).

this one is listed 9 times - I did try accessing the site in different ways before I got back in.

2:
After the nine error messages I got this this on:

Warning: include_once(/var/www/vhosts/domain.dk/httpdocs/modules/page_specific_class/page_specific_class.module): failed to open stream: No such file or directory in include_once() (line 147 of /var/www/vhosts/domain.dk/httpdocs/core/lib/Drupal/Core/Extension/Extension.php)
#0 /var/www/vhosts/domain.dk/httpdocs/core/includes/bootstrap.inc(305): _drupal_error_handler_real(2, 'include_once(/v...', '/var/www/vhosts...', 147)
#1 /var/www/vhosts/domain.dk/httpdocs/core/lib/Drupal/Core/Extension/Extension.php(147): _drupal_error_handler(2, 'include_once(/v...', '/var/www/vhosts...', 147, Array)
#2 /var/www/vhosts/domain.dk/httpdocs/core/lib/Drupal/Core/Extension/Extension.php(147): include_once()
#3 /var/www/vhosts/domain.dk/httpdocs/core/lib/Drupal/Core/Extension/ModuleHandler.php(128): Drupal\Core\Extension\Extension->load()
#4 /var/www/vhosts/domain.dk/httpdocs/core/lib/Drupal/Core/Extension/ModuleHandler.php(141): Drupal\Core\Extension\ModuleHandler->load('page_specific_c...')
#5 /var/www/vhosts/domain.dk/httpdocs/core/lib/Drupal/Core/DrupalKernel.php(584): Drupal\Core\Extension\ModuleHandler->loadAll()
#6 /var/www/vhosts/domain.dk/httpdocs/core/authorize.php(74): Drupal\Core\DrupalKernel->preHandle(Object(Symfony\Component\HttpFoundation\Request))
#7 {main}

The real domain is replaced with "domain.dk" in the above text.

3:
And after that I got the 3rd error message similar to the above one.

After I renamed the folder all worked again so it suggest that there is something in the module that is making the error.