Plugin reports "Incompatible with product license (wrong type)"

Problem
On Stash 3.3.0 and 3.3.1 some plugins may report Incompatible with product license (wrong type), while the product license (Stash) matches the tier/type for the add-on license.

This behavior has been observed with Open Source (unlimited) licenses and the NotifyR plugin, but others may be affected too.

Workaround

If on Stash 3.2.4+, upgrade the UPM:

1. Check if the UPM can be updated in online mode, if can be, update it. Otherwise use the following guide:
2. Download the UPM add-on 2.18.2 from its Marketplace space
3. Follow the instructions below to update it in your instance:
   1. Updating the Universal Plugin Manager

Alternatively, apply an evaluation license for the add-on until and upgrade to 3.5+ can be scheduled.