I keep getting a page not found error on error logs

Missing screenshot, please can you provide it?

Screenshots of error attached here

In both of the minified files there are mappings mentioned, but the maps don't exist.

//# sourceMappingURL=bootstrap.min.js.map
/*# sourceMappingURL=bootstrap.min.css.map */

Simple case of adding the map files?

I think that should fix it, I can see Chrome dev tools complaining about the map files not being present without the change, then a 'Map loaded' message with. Ill have to confess I can't reproduce the log entries (or errors) with/without the .map files however.