Connection Error after installation

Hi Franky,

I would love to try your plugin as it seems to have almost all features I need for my website. The installations goes smooth and easy and I can see the “Events made easy” section in my wp admin.
Once I navigate to the location or events page to create a new event or location I do get the following error: “Bei der Verbindung mit dem Server ist ein Fehler aufgetreten.” (in german) which is something like “An error occurred during the connection to the server.” in english.

It seems to me that not all necessary tables were created during activation of the plugin. When I check my database (mysql version: 5.5.58-nmm1-log – (Ubuntu)) there are only the following tables created:
– wp_eme_events_cf
– wp_eme_groups
– wp_eme_locations_cf
– wp_eme_memberships_cf
– wp_eme_usergroups

I tried the installation on all of the following PHP versions with the same result: 5.6, 7.0, 7.1, 7.2 and 7.3

Is there something that I am doing wrong or do you have any advice for me?

Best Regards
Manuel