I don't see how anyone can answer this. It sounds like the error is reporting something harmless, since you've been able to use the script, but we really don't know. Sometimes older scripts are just warning that it may not work in a future unknown version, other times the error means that one of the features either doesn't work, or won't work correctly. Sometimes an error is halting the script from doing something else later on in the thread.

PnP still has people dealing with it, so it may be possible to find help there. Some related links are at https://mircscripts.net/1Vxgh