Sandbox Add User Invite User Invalid URL

I have added a new user to our SandBox development environment and sent the invite email,

However when the email arrives the url ro register the new user is invalid and just goes to a 404 page or just says the activation has expired.

Community Manager

Can you login your sandbox service web and resend the invite email and check your email to activate it before it expires?

Author

The First Step

I have tried the user invite before it expires but the link returns a 404 web page response.

404 Not Found

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