Calendar show blank page of events

🍱 Features & apps 📆 Calendar
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1

Hi, recentrly I complitely reinstall my vps, change distro version and upgrade some packages.
After reinstalling Nextcloud i have this kind of problem: when i open calendar app, it show me blank page of events, if I try to switch the view from “day” to “month” it does nothing. (screenshot)

Screenshot 2021-04-11 022930
Screenshot 2021-04-11 0229301918×937 44.2 KB

I caldav sync work across all my decide, so it is working.
I noticed so if I go to the settings pages (sometimes need to do so several times), when i return to the calendar it start working.

Any idea about what happen? Thx

Debian 10
PHP 7.3.27
MySQL 10.3
nginx 1.14.2
Nextcloud 21.0.1

2

ok I have a news, if i switch between different apps, nothing change BUT if i’m in app calendar at link

mydomain/apps/calendar/

and I click again on calendar icon, it goes to

mydomain/index.php/apps/calendar/dayGridMonth/now

and with the second one, calendar working perfectly, how could I resolve this? What is the problem?