The grid was working fine before 2 days but now started to face this issue. None of the grid is loading
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Try this,Open LIS Supplier Record Type and manually full sync.Open record type and fix list grid columns data.As i can see banner on top of your screenshot seems to be a upgrade issue please wait meanwhile appian fix it.
Could you please more specific about the resolution or it would be great if you help out what to exactly. Even I tried to troubleshoot but no issues shows up. But unable to view any record type record lists or interfaces.