For some reason, the modal close button (the small X in the upper-right of the modal login) doesn't do anything. Clicking slightly below it closes the modal, but, of course, that's not something one expects.
You can see this on one of my sites: https://www.thechipwitch.com - the text link to bring up the modal is in the upper right.
Might I have configured something wrong?
Problem found -
The main component has an option to load or not load jQuery JS. It says to not load it if another component loads it. Of course, I have other components loading jQuery, so I disabled this.
But in looking, you don't load jQuery in a pristine state. You ship with a customized version that has the code in it needed for SCLogin to properly center itself and have the modal close button work. It uses "jfbcJQuery" to access the library, in fact. Specifically, <script src="/media/sourcecoast/js/jq-bootstrap-1.8.3.js"></script> is injected. Without it, SCLogin won't work right.
Which means I'm tied to loading your big jQuery, even though I'm not only loading it myself, but am on jQuery v1.12.4.
What to do?
Unfortunately, there's not a way to fix this reliably other than to include ours. The jQuery and Bootstrap versions we are compatible with are the ones that ship with Joomla. If those versions are being used by other extensions or they are loading Joomla's versions, then you shouldn't need our "Include jQuery / Bootstrap" setting. If you're site is loading newer versions, which have incompatibilities with the older versions (like you mention), you'll need to load our compatibility layer.
Joomla 4 brings jQuery up to date and decouples things better. We're very excited about the opportunities there.
I hope that helps explain,