In my case, the problem was the lack of a Slash "/" at the end of the domain.
To get both strings, use the following:
SELECT * FROM core_config_data WHERE path = 'web/unsecure/base_url' OR path = 'web/secure/base_url';
Then update them manually and make sure that the domain has a final "/", otherwise it will combine the domain name with the next folder name.
You can check if this is your condition if during the check you see the wrong path to CSS and JS.
The correct configuration:

Invalid configuration options in:

- Remember to clear the var / cache folder.
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