Typical Samsung, it's not that they are issues just they don't acknowledge there is an issue. Mine was working until two days ago, clearly something Samsung has done because there's were no updates to my phone. Today I did a complete reset of the phone and the watch, still cannot login . My pixel 2 XL and Samsung watch worked for the last year. Before that I had no issue with my LG. It is clearly something Samsung has changed. I imagine they are to busy with the Samsung Fold issues. Seems Samsung hasn't learnt from previous failures, knowledge the issue. It took them a while to knowledge the note issues before they were recalled.
Same problem here, tried to factory reset my Huawei Mate 20 pro twice yesterday just to be sure that my phone is not the problem.. I started a support chat with 3 of Samsung support but they didnt help me at all...
I got a link from one of the Chat support guys and the link returned with
HELP me please I just bought the watch!
Oh come on samsung fix this ASAP. You cant force people from using samsung smartphone this way.
Moto G5S plus
Updated wearable apps
This is server problem and its hard not to believe that its not intentional.