Improve Error Message (Bad Gateway (502))

[sosiology]

Is your enhancement related to a problem? Please describe. Sometimes error messages in Visualize (editor mode) do not support in indentifiying the issue. In some cases it may be possible to optimize the message shown, so the the data owner can identify the root cause and potentially solve the issue independently.

Describe the solution you'd like Improve error message for Bad Gateway 502 so it is more clear to the data owner what needs to be adjusted in the cube.

Describe alternatives you've considered none

Usecases and impact Provide helpful information to the data owner so they can better hone in on the problem and quickly resolve the issue

Additional context https://github.com/visualize-admin/visualization-tool/issues/1086 https://github.com/visualize-admin/visualization-tool/issues/1086#issuecomment-1612595029