VST3 plugin not registered anymore

#1

I made the switch from Kubuntu 24.04 (KDE Plasma 5.x) to Arch (KDE Plasma 6.6.4).
I took the .vst3 folder, which I backuped from the Kubuntu system, copied it 1:1 into my home directory on the new Arch system. Of cource I expected it to just work exactly like before. On both systems I was using Ardour 9.2, both were KDE Plasma, only difference beeing Plasma 5 (Qt5) vs Plasma 6 (Qt6).
Now I got one plugin that is not recognised anymore on the new system.
Could that be because of Plasma 6 (Qt6) colliding with the plugins GUI framework or is there something else I’m missing?
How can I debug and confirm that it’s the GUI?

The Plugin Manager shows this error:

VST3 module-path '/home/foo/.vst3/XCTR v3.vst3/Contents/x86_64-linux/XCTR v3.so'
[Info]: Scanning: /home/foo/.vst3/XCTR v3.vst3
[ERROR]: Could not load VST3 plugin '/home/foo/.vst3/XCTR v3.vst3/Contents/x86_64-linux/XCTR v3.so': libcurl-gnutls.so.4: cannot open shared object file: No such file or directory
Cannot load VST3 module: '/home/foo/.vst3/XCTR v3.vst3/Contents/x86_64-linux/XCTR v3.so'
Scan Failed.
#2

Your plugin needs libcurl-gnutls and your Arch installation doesn’t currently have it.
If you install that your plugin should work again.

#3

Actually the developer should re-compile and statically link the plugin to not use any external system-wide dependencies. Plugins should be self-contained (like on other OS).

#4

I agree, but they don’t even appear to have that particular plugin for sale anymore, so the chances of them re-compiling it is probably slim.