how do i fix weak security

Greetings, mustaphafromharrow!

Thanks for reaching out to the Apple Support Communities! We understand that you're receiving an error about 'weak security'. We want to help you locate the answers you need. First, we would like a few details from you.

Since you're in the Apple Support Communities forums for macOS Sierra, we want to confirm, are you using your iPhone as a HotSpot for your Mac? If not, please verify the device(s) that you're using, along with their exact software versions.

What does the exact error message say?

Once more information about your issue is posted, others in the Apple Support Communities may be able to offer answers and support.

Cheers!