"Installing..." page hangs when attempting to install add-ons on new XF 2.3.3 instance

[GerbilSoft]

I set up a test instance of XF 2.3.3 so we can do a test upgrade first before upgrading our main site. I got the latest versions of the add-ons we're using and extracted them; they now show up on the Add-ons page as uninstalled. Attempting to install any brings up the "Installing..." page, and that's it. It doesn't seem to advance past that.

Server OS: Debian 12
httpd: Apache 2.4
PHP: 8.3 (tried 7.4 as well)

I am using Cloudflare, but I set it to bypass the cache on the staging domain...

Read more
"Installing..." page hangs when attempting to install add-ons on new XF 2.3.3 instance

free plugins
minecraft paid for free
mcmarket
mc-market
free minecraft paid plugins
free minecraft plugins
spigotmc
SpigotMC
aac free
ewg free
Minecraft Premium Plugins
ewg free download
litebans free
epicworldgenerator free
free schematics
leaked schematics minecraft
schematics
schematics leaked
schematics free
minecraft schematics free
paid minecraft schematics free
paid minecraft schematics for free
free cracked plugins
free cracked minecraft plugins
plugins
featherboard download
featherboard plugin download
antiaura download
xenforo leaked
xenforo for free
xenforo addons