Powershell script not working in 4.30

I have a powershell script that logs into a nop site and restarts it. It works for version 3.90, but not for 4.30. We have skipped versions 4.00, 4.10, and 4.20 so I don't know if the script works on them. I didn't provide many details in hopes that someone has seen this happen and has the quick fix. I can post the script if needed.

Are you getting any errors?
Are you running the script on your local PC or on the server?
It may be best to post your script, since there are many ways it could be done.