Method Drupal\ultimate_cron\Form\SchedulerSettingsForm::buildForm() should return array but return statement is missing

@alena_stanul, above MR is fixes the issue , I have tested locally, working well for me.

This is indeed broken, but it's also a duplicate of several existing issues like 📌 Make global setting ui dynamic and use it Needs work , won't commit this as the logic is broken around that settings form and showing settings that don't work or even break on saving won't make it better.