I manually moved my plugins to Illustrator 2021 and now get this error when I load up illustrator. Do I just need to uninstall and reinstall my plugins? I'm not sure if ESKO and Cutting Master 4 work with this new version of illustrator.
Okay so ESKO Cutting Master 4 came out with their own solution here:
Not sure how to fix the ESKO plugin yet.
Third party plug-ins always will need updating when a new version of Illustrator is released. You will have to contact the third party developers to get the versions of their products which are compatible with the new version of Illustrator. WARNING: It usually takes a bit of time before new versions of third party plug-ins can be released. That is why it is never a good idea to immediately update Creative Cloud apps upon the release of the new versions.