I tried to install Grav (grav-admin-v184.108.40.206.zip) on Debian 11, PHP 7.3.
I didn’t install custom theme or plugins.
The server is isolated on a private network.
The admin of Gray is so slow, nearly unusable. It took like 1 min between each click on the right panel.
(Dashboard, Configuration, Accounts, …) and same in tabs.
The server is not overloaded, he is running fine other software and wikis.