MacBook Messages and FaceTime sign out after signing in

Re: "Hello I have a 2017 MacBook and I can not access my messages or face time and when I do sign in it signs right back out"

First: You may want to check via Apple menu > System Settings > General > Software Updates, to see whether your Mac is up-to-date with the newest compatible MacOS version for that model. (If you choose to update, it is wise to back-up your Mac first)

If your Mac is already using the newest compatible MacOS version for that model:

Try restarting your Mac (ie: Apple menu > Restart) This deletes temporary files, re-establishes connections, may update recent setting or other changes, and often restores order if something is not working as expected.

If you still cannot access Messages and FaceTIme:

Apple support provides a trouble-shooting article (link below) that may be helpful:

See what to do: If you can't sign in to your iMessage account or FaceTime on your iPad, Mac, or Apple Vision Pro

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If needed: There's also a Messages Support Website online: (info. / support / contact etc.)

https://support.apple.com/messages