Cannot read properties of undefined (reading 'message')

Self Hosted Retool
1

If the application is exported to JSON and then imported as-is, the following error message will be output.

Cannot read properties of undefined (reading 'message')

It also occurs in "[Sample App] Users Dashboard".

2

I see that you are getting a 403 error, what could be the possible cause?

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3

WAF was the cause.

4