Hey guys! already with a instalation moodle 3.8.3. Later I did a migration of moodle 3.8.2. That Instlation is Ubuntu 18.04, Mysql 5.7, php 7.2 and nginx 1.14. But the moodle doesn't load my theme.
Start by clearing caches...I normally do this manually by deleting cache and localcache folders from your moodleDATA folder.