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With the latest version of Permalink Manager Lite (2.4.0) and some older versions, there seems to be a conflict with the SEO plugin RankMath.
In the admin post editor view, the RankMath section is not loading, and we’re seeing this error in the console:
Uncaught TypeError: Cannot read properties of undefined (reading ‘isSavingPost’)
at permalink-manager-admin.js:361:52
at data.min.js:2:17688
at Array.forEach ()
at n (data.min.js:2:17676)
at Object.emit (data.min.js:2:17829)
at u (data.min.js:2:18069)
at data.min.js:2:19155
at data.min.js:2:17261
at p (data.min.js:2:7139)
at data.min.js:2:10555
If we disable the Permalink Manager Lite plugin, the RankMath plugin works as expected.