Categories under calendars not showing

Site URL: https://www.lingomundoacademy.com/

I have calendars in Acuity Scheduling. Under Each Calendar I have categories and under categories I have different classes.

Example: Adult Group Classes -

Category Session November 4 - January 12

Category October 21 - December 20

Under each category I have different language classes

Example: Category Session November 4 - January 12

English

Spanish

French

Until this week, on my SquareSpace website, with my calendar Adult Group Classes, my categories were appearing, then the customer clicked on the category he wanted and then the classes appeared.

Now all the classes for all the categories are appearing day by day (as if it was an individual appointment while those are all group classes) and not the categories (that grouped all the classes) any longer...

Please help as not only it defeats the purpose of the categories under a calendar but now my customers cannot see all what we offer. I did not change anything in Acuity Scheduling or SquareSpace

Thanks