Occasionally when you install or update a module, you can find the the UI displays the parameter names with a leading ¿ and trailing ? character.
This is because Ignition doesn't update its display string resource cache until a restart, so the cache doesn't contain the correct display strings and instead shows a mangled setting id.
Performing an Ignition restart should resolve this issue.
If the troubleshooting tips did not help you resolve your issues, please open a ticket with Support making sure to include the MQTT Transmission, MQTT Engine and MQTT Distributor logs as appropriate.
From the Ignition Logs view, select the Download icon to download a copy of the system-name.idb file to your local file system. You will need to compress (zip, 7z or rar) this file before sending to Support.