I had already publish my device.
In web (ide.mblock.cc), I connected my device on USB.
In upload mode, I can upload a firmware via USB.
And in live mode, I can upload a pre-compiled-firmware via USB.
In Live mode, I cannot send a message when click a block - a block that send some bytes via USB.
Error Log is " Cannot find app.runDevice env" on chrome debug console.
I downloaded a mext file from extension builder page.
and I add the mext file to mBlock offline version.
On offline mblock app, the above problem does not occur.
I hope you give a solution how to fix this problem or give some insight.