Thanks for the quick reply! It had indeed input the wrong channel ID before, but now after triple checking I’m confident it’s right. My YouTube channel looks fine (verified, in good standing). On the Ultimate Social Media Icons set-up page for “What do you want the icons to do?” I checked both YouTube boxes and input the channel ID and saved the settings. Then I refreshed my own website page.
When I hover over the icon it still reads ! error, and the only thing that shows above it is Visit Us. It works in that capacity – you can click and go to the channel page. I assume the error thus relates to subscribing to the channel. Any more thoughts? Thanks again!