[Bug]: Unknown error occurred

[thomas41587]

I Have A Problem With:

The integration in general

What's Your Problem

Trying to add "Abfallwirtschaft Germersheim (abfallwirtschaft_germersheim_de)" for Germany. And receiving "Unknown error occurred" after selecting ANY source for Germany. It does not matter which source I try to select, I do always get a "Unknown error occurred".
Already tried removing the hacs_waste_collection_schedule and installing it again but this did not change anything.
Previously it was working but yesterday it suddenly stopped without known change. So I started trying with different sources and also reinstalling...

Source (if relevant)

Abfallwirtschaft Germersheim (abfallwirtschaft_germersheim_de)

Logs

No response

Relevant Configuration

No response

Checklist Source Error

• Use the example parameters for your source (often available in the documentation) (don't forget to restart Home Assistant after changing the configuration)
• Checked that the website of your service provider is still working
• Tested my attributes on the service provider website (if possible)
• I have tested with the latest version of the integration (master) (for HACS in the 3 dot menu of the integration click on "Redownload" and choose master as version)

Checklist Sensor Error

• Checked in the Home Assistant Calendar tab if the event names match the types names (if types argument is used)

Required

• I have searched past (closed AND opened) issues to see if this bug has already been reported, and it hasn't been.
• I understand that people give their precious time for free, and thus I've done my very best to make this problem as easy as possible to investigate.

[AndyWo83]

I have the same problem. It doesn't matter which provider I choose. About 6 days ago it was still working, except that I had a lot of duplicate entries in the calendar.
For example, there were 18 entries in one day called "Restmüll".
Uninstalling and reinstalling didn't help.
When I try to set it up using configuration.yaml, it doesn't work either, I don't get a calendar entry.

[jimjaeger]

Please have a look into the log for more details of the error and check out the #3390

[AndyWo83]

I found a solution.
Uninstall ics calender.
Delete two folders (icalendar and icalevents) with Advanced SSH & Web Terminal.
Then Restart and now it works.