Investigating more...
I can't import any external module; I have seen the log of mis where i see:
MYSTIC 001 An error has occured: EAccessViolation Access violation

Searching with google I found another guy that which had the same problem:
https://groups.google.com/g/alt.bbs.mystic/c/blrm_csdbqU

modules are in $PATH; if I run pyhton3 from cli and import those modules it does it without errors; I don't use other modules in python2.

I don't know what else to do... :-(

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 Violence is the last refuge of the incompetent!

--- Mystic BBS v1.12 A48 (Linux/64)