“Error accessing product object method”

My brother has some certain issues with his PC. He said he’s getting too many error messages from IBM Lotus Notes when he tried to open the application. The first error he got was: “Error accessing product object method.” He remembered he got this error after upgrading the client server from 8.5.2FP3 to 8.5.3 and accessing the mail file on an 8.5 server.
He also mentioned that he hit the OK button on the error and opened the Preferences tab. Under Preferences tab, he got another prompt with Error Code 219.
He got another dialog box after hitting the OK button from the second error.
He also noticed that on the left-side portion of the application, a message appeared that said, "Part of this application did not start correctly due to an open dialog box. Please close the dialog box and refresh this section to re-open the application." I have attached the images of the errors and the dialog box I mentioned above. I hope these things help. I am open to any suggestions from you guys. Thank you in advance.
