'Can not see events while debugging root rule chain in Thingsboard Cloud

I'm new to thingsboard. And currently using Thingsboard Cloud edition.

I'm learning how to debug the root rule chain but I keep on getting this error 'could not extract ResultSet; nested exception is org.hibernate.exception.GenericJDBCException: could not extract ResultSet' when I try to see the events in filter message switch or any other block in root rule chain.

Any help or pointers will be appreciated. Thanks.

here is the screenshot of the issue

thingsboardthingsboard-gateway


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