Error opening "Customization Editor"

On WFS 1.7.9, I was creating a Project about 90% of the way through and got this silly error.

I had to delete each element to debug, however I deleted to the last element and it was still there.

Has anyone encountered this problem and how did you solve it?

Test.wfs.zip (159.3 KB)

It seems very weird. I have tested with your project same issue. But I have tried with a similar project and it’s working fine. Could you please try with a new project and share your update?

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Such bugs do happen time to time. Creating a new project different name and restart of wfs.resolve the issue.

From my experience in helping someone here with somewhat similar issues

Yes, with the new project it works fine.
I’m just not sure at which step it went wrong in the old project,
is there a way to copy elements/style from one project to another?

Yes, but it is quite time consuming to create new project and rebuild from scratch.

Sorry, there is no way. You can make a copy of the previous one but in this case, some other issues may occur. So for safe side better to design from scratch.

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I had this problem too. As far as I remember, it happened when I added a Text ID Name that contained a symbol (I think it was °C). Maybe you’ve added something similar…