Copying a project failes on staging-webmodelica

[njustus]

with a 400 BadRequest:

The request content was malformed:
DecodingFailure at .owner: Attempt to decode value on failed cursor

This normally occurs when the JSON body is erroneous. This bug only occurs on the server, couldn't reproduce on a local machine, even the same docker images don't produce this problem 🤔 💥

[CSchoel]

Current behavior when copying a project:

• Open a public project with the 💻 button.
• Click "Copy project"
• Choose new name for project and hit "Copy project" button.
• No visible reaction: Window does not close and Button can be clicked again (this should not be the case)
• Window closes and the error message Couldn't copy project: Unknown error occurred: Internal Server Error Check browser console for details. is displayed
• However, it seems that the project is actually correctly copied (cannot test if simulations are possible due to Webmodelica requests neverending patience #111 )