@williamsmaith Do you know how to code?
do you understand electronics?
Have you tried any of the M5Stack accessories?
Have you looked in the documents and tried to replicate and of the M5Stack devices?

@PavelNDC Public (red) means that's it's not connected. normally this is an issue with the M5Stack server.

@Nooblearns what error?

@Wizzy38952 Have you charged it?
Erase bruce and only burn UIFLOW2

@VVong_san_ Are you erasing the old firmware first before burning?

@wjcarpenter Standby voltage. the stick doesn't truly power off and there is always a small voltage present in the stick which is why the battery always runs out.
The voltage increasing with a cable plugged in is normal and thank you for pointing out this function.

@kenneth123 Just tried and logged in with no issues.

@Slarck You should always Erase first because of this. never just burn only.
Thats the reason for the big red erase button being there!

@yuyun2000 Did you Erase existing firmware first?

@jbruggem Your first post shows that

1. you haven't configured Arduino to configure code for the M5Stack Core2 which uses a different core and pin config to a base esp32.
2. The example you are using is not an M5Stack demo,
3. Arduino is missing Libraries.

All these errors point back to not have the M5Stack Core2 board type selected.