Theme shown without styles I executed the config:import: import successfully, but now it seems that the theme settings are no longer found.
The site is now seen as in the attached image



How can I solve the problem?

Note: I don't use bootstrap theme. I imported the configuration I had previously exported from another machine on Ubuntu. This problem is on a Windows machine.
Double check and confirm that the theme files are exactly were they should be.
Make sure the /files directory exists and writable (NOT 777 permissions though)
Double check and confirm that Drupal can access the files directory via configurations
Clear the Drupal cache


If the theme is using external CSS or JavaScript files, make sure they are accessible. (most cases its an internet connection especially for front-end  frameworks like Bootstrap)