I set up Plone 6 using Docker. However, I am having problems changing settings and saving the site at all.
I checked using Chrome's DevTools and got the following error message.
For example, if I try to change the language in SITE SETUP and press the save button in the upper left corner, I get the following error message.
I have been struggling with this issue for over a week. I have checked the past logs of this community and cannot find a solution.
I would very much appreciate your advice.