I'm not sure when I started to get this error because it comes only when I open a custom taxonomy page that has some custom fields in the backend (like when adding a new term in the backend).
It could be started after upgrading to WordPress 6.1, or after updating the Metabox and Metabox AIO plugins before 2 days.
I'm storing the custom fields values of the custom taxonomy terms in a custom table, and here's the error I started to get:
https://pastebin.com/embed_iframe/dzMdRzFE