Thanks! That worked.
Just out of curiosity: What's the difference between the two?

I tried the same blocky today. It uploaded but on the display I only see: error ImportError('mqtt need download...'.)

I am using an M5Stack Fire, firmware 1.1.2.
I have a local MQTT broker running on an Onio Omega and the upload is done with a Windows 10 computer.

Any help would be appreciated.