The way to filter trainings by multiple categories

Hi,
I'm using Training Catalogue of Opigno LMS and the issue has occurred.

The things I want to do

1. Display exposed filter with checkbox (not radio buttons).
2. Display Group list which were filtered by two or more categories from user.

For instance:
We have taxonomy terms that about areas (example: area_A, area_B, area_C) and groups that about job information (example: job_1, job_2, job_3).

One of users looks for a job in area_A or area_B. He selects the both area and then the job list (job_1 and job_3) is displayed.

The issues

To be able to select multiple terms, I did these steps:

1. Add the "apply" button in the exposed form.
   capture: Home > Administration > Structure > Views > Opigno Training Catalogue (GROUP) > Advanced > Exposed form >setting
   no select "Autosubmit"
2. Allow multiple selections.
   capture: Home > Administration > Structure > Views > Opigno Training Catalogue (GROUP) > Filter criteria > Group: Category (exposed)
   select "Allow multiple selections"

Step 1 is okay but when I did 2, I cannot display the view page (/catalogue) and the error appears:
The website encountered an unexpected error. Please try again later.

How can I use checkbox as "allow multiple selections" ?