I am on JEvents v3.6.6 Stable.

Change the Joomla backend language to «German»
Go to Components > JEvents
Press the «Configure JEvents» button
Click on any of the following sections and you will find them empty (settings can neither been made nor even seen)
- Event Editing
- Event Detail View
- Main Monthly Calendar
- Year/Category/Range View
- Ical Import/Export
- RSS
- SEF/Performance Options
- Module Config
- JEvents Plugin Options

These three sections work ok:
- Component
- Structured Event Data
- Permissions

If your Joomla backend language is «English» ALL setting sections are ok.

Thank you and kind regards
Chris