Typography Entirely Changed On Own

I have been using SEOCrawler on WP.org for 3 years now with no issues. In the last week or two, somehow the typography of my entire website has changed on its own to a bold-face font. The menu, subtitles, paragraph text, and footer on my entire website is bold. Manually changing the typography on each individual element/page is not working. Changing the typography in the typography in Goodlayers is not working either. None of the changes I make are publishing. I installed a previous version of SEOCrawler assuming it was a theme update, and that did not correct the problem. Any ideas as to how I can change the line weight on my font back to its original?

Not exactly what happened but I could take a look at the website and offer paid support if you’re interested in