The data source cannot be reached or its configuration is invalid. Please contact your system administrator.

I am experiencing issues across all my Record Types in Appian. Below are the details of the errors:

1. When access any Record Type, I receive the following error:

   The data source cannot be reached or its configuration is invalid. Please contact your system administrator.

   There is an option to "Change Source Configuration," but upon accessing it, no modifications can be made and says: 
   Editing the source of the record type will break all configured relationships.
   You do not have access to the configured data source. You can choose other data sources and tables, but you will not be able to select the original table again.

2. When trying to access the Data Preview of the Record Types, another error appears:

   The System Has Encountered an Error HTTP Code: 500 APNX-1-4198-000 Error Evaluating UI Expression Expression evaluation error [evaluation ID = 2DENF]: Array is expected as second parameter, but received: .

Additional Information:

• These errors seem to affect all Record Types.

• Despite these issues, I am still able to:

  • Enter and edit Views, Actions, and the List of records without problems.
  • Edit Interfaces.
  • Access and navigate Sites without issues.

• Attached are screenshots of the errors for reference.

Could you please assist in identifying the root cause and resolving the issue? Let me know if you need more information https://ibb.co/Ycz87cD https://ibb.co/F4tD435 https://ibb.co/7rn0KkN 

Thank you!