I've pulled fresh version of postgresml from github instead of using ubuntu package (as from what I saw it still doesn't have preprocessing features) and managed to compile it and update .so library with the new one. But now it gives me a segfault even on the basic example:

2023-02-03 16:34:32.815 UTC [125591] LOG: database system is ready to accept connections
2023-02-03 16:34:44.698 UTC [125591] LOG: server process (PID 125611) was terminated by signal 11: Segmentation fault
2023-02-03 16:34:44.698 UTC [125591] DETAIL: Failed process was running: SELECT * FROM pgml.train(
project_name => 'Breast Cancer Detection',
task => 'classification',
relation_name => 'pgml.breast_cancer',
y_column_name => 'malignant'
)

ubuntu 22.04, postgresql 14