Hi,
If you go to where the file is, and manually execute it (please try it not just say it works), does it work?
As long as there are no script errors, nobody changed permissions and it's still in the same place it was before, as in nobody moved it,
no one changed it, (look at the scripts last modified date), then we also have to review what actions it is doing
Since its in SharePoint, I am going to assume you have Versioning on, so I would look at who did what, if anything to the script.
Its very possible that an Action inside the script has now changed and or needs a not required before privilege.
I would definitely start the manual test first, then review the history of the file to see who changed what, AND to validate that the files it will impact
or be used and actions aren't something a problem now.