Hi Daniel and sorry for the trouble here!
Are you able to confirm that you have both The Events Calendar (4.1.1) and Events Calendar PRO (4.1.1) installed and active when you view your Plugins screen?
If you do not have those both installed, please install them and see if that helps. If you do have them both installed and active, then will you please head to Events > Settings > Help, copy the system information at the bottom of the screen, and paste it here for me as a private reply so I can check your settings?
Thanks so much!
Geoff