unity3d – Unity iOS error: [connection] nw_read_request_report [C1] Obtain failed with error “Software program induced connection abort”

I’m doing a Unity challenge on iOS. After built-in Unity Service Cloud Diagnostics, each time the app returned to the foreground (after getting into the background), I acquired the next error messaege within the console

[connection] nw_read_request_report [C1] Obtain failed with error "Software program induced connection abort"
Connection 2: obtained failure notification
[connection] nw_flow_add_write_request [C2.1 119.28.40.105:443 failed channel-flow (satisfied (Path is satisfied), viable, interface: en0, ipv4, dns)] can't settle for write requests
[connection] nw_write_request_report [C2] Ship failed with error "Socket is just not linked"

Evidently the community connection was interrupted when the app went to the background mode.

Does anybody know what induced these errors precisely and tips on how to repair them?