First thing that needs to be cleared up for any issues in v5.0.2 is error logging. v5.0.2 was a transitional release to support PHP 7+. There can still be recorded errors that will effect workflow such as deprecated warnings that are sometimes hard to spot.
We recommend(I insist) the following:
https://www.open-emr.org/wiki/index.php/FAQ#What_are_the_correct_PHP_settings_.28can_be_found_in_the_php.ini_file.29.3F