The error message in your log:
1647188389: Connection Refused: unacceptable protocol version
Does not match the configuration you show in the top post:
bridge_protocol_version mqttv311
In your double post (post right above) the bridge_protocol_version is missing which can explain the error message but it does not match the configuration that you show on top.
You should now (with protocol version specified) probably see a different error message which is not shown in your posts. FYI: Filename should be mosquitto.conf (all lower case).
A possible solution for your problem was already described here:
Use the Forum Search option to find information on the forum.