The site seems to be loading assets from http instead of https. Make sure you call the base href tag in the header uncached:
<base href="[[!++site_url]]" />
That’s unrelated to the sourcemaps; that just means you’re using minified css/js but the file containing the “sourcemap” from minified > unminified files was not uploaded. That’s only an issue if you’re a developer trying to debug a problem in production