Can’t install WordPress in a subdirectory (Please provide a valid username)

Installing WordPress into a subdirectory today produced an error “Please provide a valid username” (wp-admin/install?step=2).

No matter what I tried, WordPress wouldn’t accept the username, even though it fulfilled the validation requirements.

It turns out that if you have a .htaccess file in the root of your website your username won’t be accepted. Temporarily rename .htaccess and your installation should be accepted. (Don’t forget to rename it again!)

Thanks, Crimbo!


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