Scrambler, I ran AutoSSL on the new test site, which removed a lot of the console errors. Most of the remaining errors are on jpeg images and not relevant. The key console error is a 404 on this stylesheet:
<link rel=’stylesheet‘ id=’weaverxt-style-sheet-css‘ href=’https://sirinc.org/test/wp-content/uploads/weaverx5-subthemes/style-weaverxt.css?ver=104‘ type=’text/css‘ media=’all‘ />
I looked at the filesystem and there is indeed no weaverx5-subthemes directory. Does this help?