Connection problems with vibrate 750 and vdb780

Hi I had to remove my vdb750 because of a door change. Now it won’t connect to the internet. I removed it and tried reinstalling, to no avail. My vdb780 was working but now it won’t connect. Help, please

Attempt to factory default the doorbell by pressing the doorbell button until the LED flashed red and green. Then learn it back to your Wi-Fi and then it should be able to learn into your account.

Thank you Vidail! I will do it and report back.