Critical error on system booking

Hi I have a serious problem with the plugin

We have configured the plugin

If you try to book from the site by following these steps

– FN PARRUCCHIERE DONNA
– DONNA
– TAGLIO + PIEGA
– FEDERICO NAPOLI

the system goes crazy and I no longer take the configuration if there are too many associated services?

If you check the configuration you will see that on Monday morning he has associated WOMAN services (available in one place)
while in the afternoon the man servants (in another place)

As soon as I put too many services every day it goes wrong and it works for me now only on Saturdays and I don’t know why