Some questions about deck and calendar

I added some work tasks on the deck, as shown in the picture below

After that, I can view the added deck in calendar. However, there seems to be some problem. When you click on it, you will receive the following prompt: Please ask your administrator to enable this app. As shown below


In fact, the effect I want is this. Even if the content created by the deck is in the calendar part, the reminder part can still be configured in the calendar. This way I won’t get the wrong assignment. As shown below

I want to know how I can achieve the results I want. I am not a professional technical R&D personnel and I very much look forward to your help. Thank you.

The following is my system environment and software information:

System: centOS 7.6/nginx/php8.1.25/mysql 5.7