Ubuntu chromium and web ide

You don't have to worry about the serial_frame and /serial/ports errors, but yeah, BT> ERROR: NotFoundError: Bluetooth adapter not available. is your issue.

Chromium looks up to date too. So do you see the Web Bluetooth menu item? Just nothing happens when you click it? Or do you get some other error/warning.

Googling it, it might be that the bluetooth adaptor is turned off in Bluetooth settings? Worth a check - I don't know whether gatttool might have been able to overwrite the settings since you were running it as root.

I know you tried gatttool but please can you just see if sudo hcitool lescan is able to list devices?