May 20, 2020
I just had this exact same problem. "Oops! Something went wrong" would not go away. I restarted my phone, the app, my headphones, etc. Nothing would fix it. Finally, I went into my bluetooth settings on my phone and told it to forget "LE-Bose NC 700" and that fixed it! The next time I tried to add my headphones it went through the whole flow without another "Oops!".
Jun 5, 2020
Thanks for the tip! Going to iOS Settings -> Bluetooth -> Bose NC 700 -> Forget This Device fixed the problem for me and I was able to re-pair my headphones.
Aug 24, 2020
Same here. I can connect it to iphone and macbook but not to the Bose Music App so I cannot control ANC level, etc.
Sep 30, 2020
having the same issue, october 30 2020. ios 14. absolutely ridiculous. please advice. nc700 cannot connect to ios bose music app. do not purchase. please let me know how to fix this
Nov 13, 2020
I have the same issue- could connect to the headphones and play music on the iPhone but the Bose Music app wasn't able to connect.
I fixed this by doing the following:
Launch the Bose Music app.
Press and hold the power/Bluetooth button on the headphones until it allows a BT connection.
This caused the Bose Music app to prompt to connect.
After connecting, everything is working.