Bootstrap styling appears on my dev box but not on production

[SundialServices]

On my development machine, everything looks fine.

But when I deploy the site on a production server, the Bootstrap styling does not appear. (Identical browser ...) There are no 404's. The CSS-files etc. are accessible and if you manually type in the URLs you see them. I've done "collectstatic."

When you inspect the HTML between the two systems you can very plainly see the DOM that Bootstrap has included. But it's not there on the production version.

I guessed about adding "bootstrapform" to INSTALLED_APPS but it didn't help.

What could possibly be causing this?!