Adding a Youtube link stops wordpress from loading

I love this plugin, simple, and looks great on your website but I’ve run into a little problem. When I try to add our Youtube account into the Youtube link section, and hit save, a FORBIDDEN page comes up displaying:

“you don’t have permission to access /wp-admin/options-general.php on this server.

Apache Server (website) at port 80″

Does anyone know how to resolve this? Could it be that the Youtube link in somehow faulty or broken?

Here’s the link: https://www.youtube.com/channel/UCzZQEY-F1hqV6Nv-AJwdPcA

There’s currently no content incase some of you think of this as spam! ??

https://www.ads-software.com/plugins/hs-social-media-buttons/