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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Currently we don't have a solution for this until appian fix this, But recently i had created a personal worrkspace account using my secondary ID, with Germany server, Everyhing is working fine(didn't see any issues), if someone looking to have hands-on, you can try germany server, but understand, there will be latency, unsupported features etc. This is one of the solution, if you want to start from scratch/explore.Happy to help if anyone needs guidance for creation.
A good workaround for time being!