For some reason the latest update to the Pixel 3 and Pixel 3a (and their XL variants) has caused the OS to try and toggle on the OS wifi calling, which doesn’t work with Republic. As you may know Republic has its own wifi calling and doesn’t use the OS version. When this happens the phone throws multiple errors. To fix this, go to Settings – Network & Internet – Mobile Network – Advanced – Wifi calling and toggle it off. That will fix the errors and will not impact your ability to make wifi calls
If the option isn’t present on your phone, then unfortunately only a network settings reset will fix the issue.
Before you take this next step, please note it deletes all Bluetooth and wifi connections, as well as resetting the cellular connection.
Go to Settings > System > Advanced > Reset Options > Reset Wi-Fi, mobile & Bluetooth
Read the warning, tap “Reset settings.” You will be warned a second time. Tap “Reset settings” to confirm. The process will usually take 5-10 seconds and the cellular signal bars icon will go away for a moment. Once the cell signal bars icon returns, you should reboot the phone.