Changes in Products Filter settings are not been saved

I′m working with the latest version of this plugin, but none of the changes I try to do in the Settings is been saved, even when the message “Your settings have been saved.” appears
https://www.woocommerce-filter.com/lot-taxonomies-settings-page-save-options-doesn-works/
I already did this and also added more ( 300000 )
I have around 60 taxonomies product filter.