'Structures themes projects part having some issue

I have recently created a new theme for a project. After that, it is working good in my environment and I have checked in to this main branch. Then anyone who got the latest start to giving above error. Including myself when I checked out to a new location.

I have updated visualizer couple of time and current version is "Version 8 Service Pack 4 Fix Pack 59" I am not sure what was the early version was.



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