PSA: Be aware of Apple ID issues if you're using OCLP with MBP 2017
It seems to be a universal issue - if you search for "Apple ID/Apple Account" in this sub, almost every post you'll find is about Apple ID login issues on 2017 Macbook Pros.
I've had this happen to me too - after a couple of months, i was prompted to reenter my password in the Settings app to log back in to my Apple Account. After typing the password and confirming, the login page got stuck or some other weird issues kept occurring.
I've thankfully managed to fix that by rebooting a couple of times, or just waiting it out - one time the issue has fixed itself after a day or two. To be fair, I'm not really using my Macbook for professional work, so it was not that big of an inconvenience, but I realize how big of a headache it could be if accessing Apple services is crucial to your work.
If you have a 2017 Macbook Pro, don't be discouraged to update it with OCLP - it's still the best thing that happened to my machine, like ever. It's still a very good piece of hardware, and you can breathe new life into it.