Hiya! I'm just loading up my m5stack atom matrix for the first time. I have a few assorted issues I'm trying to work out:

1. I am on Ubuntu 20.04
2. I just flashed the device with the M5Burner/UIFlow. This at first required sudo, otherwise I got a read error. I added:

• udev rule SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", MODE="0666"
• Added myself to the dialout group

3. This made it so I could burn the device without root, though clicking the configuration button gives "Get UIFlow settings failed, check your COM and retry."
4. Regardless of how I burn it, I can't open https://flow.m5stack.com/ . I get a white screen and the following in the console

Failed to load resource: net::ERR_INCOMPLETE_CHUNKED_ENCODING scripts.34154e73397ff3f297bb.js:1
Failed to load resource: net::ERR_INCOMPLETE_CHUNKED_ENCODING 
main.1685f54dc91eb35eda91.js:1 

I tried both firefox and chrome.

I assumed maybe that this is because the browser needs access to the USB---but I have not successfully gotten that to work yet. Any ideas for how to fix it?