Fix Usernames can contain lowercase and numbers in WP.

Question

Hey! I am using WordPress for my blogging platform for 5 years. But recently I have installed WordPress Multisite. I have installed a forum with a subdomain. But the problem is When I (Site Administrator) want to create a new user from the admin account it says “Usernames can only contain lowercase letters (a-z) and numbers.” That means I can’t use the uppercase letter in the username field. And it’s happening only from the backend administrator account while creating a new user. But it is not happening in the front end of the forum while creating a new account.  Is it possible to fix this error?

If someone can help me. Thanks in advance!

Fix Usernames can contain lowercase and numbers in WP.
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lowranger 1 year 0 Answers 647 views Novice 1

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