QR code missing (Not using nginx)

[Gibsonion]

The QR code is being generated as I can view them in the Cache folder, but for some reason I'm unable to access it via the admin area.

When I try to view the link via the inspect I just get a blank white square appearing.

I've read through the issues and none of them seem to be helping as most of the same issues seem to be an nginx problem. I working through cPanel and pretty sure it's not using nginx as I've checked for it with 'service nginx status' and got
Redirecting to /bin/systemctl status nginx.service
Unit nginx.service could not be found.

The output is as follows:
/srv/?id=iqrcodes&key=35b7bd4da4a8a950ff26c038512d2ab4&fn=qrc_d96f4d7c33644cb0466fbdcde86785a9.png

Any ideas?

[tofuSCHNITZEL]

have you checked your htaccess file if it contains the proper config?
https://yourls.org/docs/guide/server-configuration
if you right click on the qr code in the admin area and copy the link and directly open it - what is displayed?