Same problem here
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Open Xcode | Settings | Accounts and make sure your session isn't expired. Fixed it for me - Xcode 14
The same iPhone works fine connected to my Macbook Pro connected to all the same networks.
Having same problem many times a day... Safari is almost unusable at this point... Constant POSIX errors and page load fails...
Please Fix. I hate using Chrome.
This started happening to me in Xcode 12.4. I found that if I disconnected my devices the problem went away. Not a solution but a decent workaround.