For some reason IDA executes FreeLibrary() to the plugin immediately after getting its PLUGIN structure's address, so later invocations of the plugin lead to calls to nowhere (that was supposed to be python3.dll). Simply patching the location of the FreeLibrary() call fixes the issue. The location is easy to find: go by cross-references to a place where the call to FreeLibrary is followed by a reference to the string "%s: incompatible plugin version..." and NOP it away.
ida.dll
+001c1d20 15 9b e6 e3 ff 48 8b 4d 88 48 85 c9 74 0e 90 90 |.....H.M.H..t...|
+001c1d30 90 90 90 90 48 c7 45 88 00 00 00 00 48 8b 4c 24 |....H.E.....H.L$|
ida64.dll
+001cb050 15 83 53 e3 ff 48 8b 4d 88 48 85 c9 74 0e 90 90 |..S..H.M.H..t...|
+001cb060 90 90 90 90 48 c7 45 88 00 00 00 00 48 8b 4c 24 |....H.E.....H.L$|
ida.dll
+001cb6f0 15 03 4d e3 ff 48 8b 4d 88 48 85 c9 74 0e 90 90 |..M..H.M.H..t...|
+001cb700 90 90 90 90 48 c7 45 88 00 00 00 00 48 8b 4c 24 |....H.E.....H.L$|
ida64.dll
+001d53f0 15 0b b0 e2 ff 48 8b 4d 88 48 85 c9 74 0e 90 90 |.....H.M.H..t...|
+001d5400 90 90 90 90 48 c7 45 88 00 00 00 00 48 8b 4c 24 |....H.E.....H.L$|
ida.dll
Patching not required.
-EAA2A 00 48 85 c9 74 0a ff 15 ea 0d
+EAA2A 00 48 85 c9 eb 0a ff 15 ea 0d
ida64.dll
-EEC80 ff 15 9a 5b 26 00 48 89 7d 00
+EEC80 90 90 90 90 90 90 90 90 90 90
Thank you, it worked 😅