Zabbix Frontend Black Page

[cdaher]

I'm facing a strange behaviour that begun a few mninutes ago.

When I logon to Zabbix frontend it shows nothing and no menu works:



Zabbix version is 5.0.21 on Debian 10.
Mysql version is 8.0.28 on Debian 10.
Php version is 7.3
Frontend is Nginx

Tried to open it on Iexplore, Chrome, Firefox, Brave...same issue.

Someone can help me figure out what's going on?

Thanks in advance.