3827950 - Error in logs: "could not parse preferred language in compact user profile response: invalid locale, expected 2 or 5 characters, got XX"

When booking a trip, a generic error message gets displayed right after clicking the Search button:

The following error is captured in Concur Logs:

 "Error in shopSvc.Shop: Error in svc.getShopData: Error in profileFuture.Collect: Error in s.ProfileAdptr.GetProfile: could not parse preferred language in compact user profile response: invalid locale, expected 2 or 5 characters, got XX"

Error "An unexpected internal error occurred. Please try search again." Error when trying to search for car rental in Concur , KBA , CON-CA-TLS-IEM-IMP , Import Credit Cards , Problem