In my case I had to put proxy URLs for http and https in settings.php (sites/default/settings.php) on my dev server. Had issues with site crashing after loadng bootstrap theme with jsDelivr CDN, couldn't even get into theme settings, but now everything is back to normal.
These records shouldn't be overwritten now.- πΊπΈUnited States philsward
HTTPRL was causing the issue for me.
I disabled it, fixed the version in the bootstrap theme and re-enabled it.