After the update the Addons that used a special interface stopped working, when interacting with the mob the interface does not open.
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Does the add-on use the Holiday Creator Features experiment?
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The Holiday creator features was removed in 1.21.20, Which will not work anymore.
See MCPE-185311
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We're tracking this issue in MCPE-185311, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki