That results in a slightly more helpful message - Error: window.external.OpenDocument is not a function
. That being said, the HTML doc you send me was really useful to look into the issue.
I have noticed that if I paste the full order URI into a browser on my system (sp-select://./ordertracking/order?id=A5B587E5-12BD-E011-96CC-E02A82F630C8), it will launch Select as I expect.
I'm afraid I don't know the reason for the issues. Are you using the same browsers? I wonder if it is a permission issue since many browsers disallow scripts from untrusted sources. As far as I know, the last Select 4.2 went out at the beginning of 2018 so this may be a long standing change. You will need to contact the SoftPro Customer Service phone number for help. If they don't have an answer, they can contact the R&D department for resolution.