The User Activity Log shows an error: Unable to parse: ERROR: Unexpected token in group expression: Owner at index 27. What is the root cause of this issue?
Offline Validation rules do not support the Owner field. The Owner Field is used to support the Application global variable.
Users attempting to create Cross-Object Owner formulas to retrieve information on objects that can have Owners of different object types receive this error.
Do not use Owner field in validation rule.
Vault Help Documentation: Offline Validation Rules
Send us your feedback: We are always looking for feedback to help improve our Knowledge Base! Please let us know if this article is helpful or provide feedback on how we can improve your experience by clicking here.