Error: Incorrect DATE value: '23:45: 30'

Hello Joomla fans,

I cannot create new locations and events, this only worked on the first and second day. I always receive the error messages:
Save failed. Error: The URL format is incorrect - and - Incorrect DATA value: '18:26: 31'

For a helpful tip to fix the bugs, I would be grateful.

Greeting
Aray

The seconds have a space before the number. The format must be HH:MM:SS (without spaces).

After all, I set the event time via the drop-down menu - the error message still arises.
Joomla version: 5.3.3
Current JEM version

Please, try to describe step-by-step, how create an event with seconds. JEM has only hours and minutes!

What further steps? I only set the time with hours and minutes and the drop-down menu!? 

Hi,
I looked in the database to see if another date format is expected there, this is not the case. Furthermore, this error message: Save failed is output with every memory attempt. Error: Incorrect DATE value: '23:45: 30'
COM_JEM_WRONG_EVENTRECURRENCE_WEEKDAY

I think that this is not an unknown error and someone could tell me why this error output is. I only use the specified automated input fields?

Thanks for your hints.
Greeting