Mailbox sensor and bridge don’t work

Installed bridge and mailbox sensor twice now but it doesn’t detect anything. The bridge says online signal strength is good and it does have a network name. Mailbox sensor says motion detection on, has both motion detection and motion notification on, device health says device status online, bridge status online, bridge to WiFi router signal good, mailbox sensor to bridge signal good, battery level 100%, motion settings I’ve tried medium and high. I do have a linked device set as my doorbell which is colored blue and on to record event. The only thing in event history is mailbox sensor added to system and it just does not work. I need advice. I have uninstalled and re-installed both mailbox sensor and the bridge twice. Thanks for any help. Dave