Hedwig2021 - 2021-01-12

Hello,
I have been using veracrypt without problems for the last years. Today I accidentally compressed the container volume and since then I cannot uncrypt it anymore.
I get the error message that I need to unclick "compress folder content" in the properties menue of the container file. But when I open the properties I cannot make any changes to the settings.
Has anyone experienced the same or does know how to solve this?
I greatful for any hints on this..