In case “Your device does not have permission to enter” appears
and it does not allow you to enter.
If 'Your device does not have permission to enter' appears,
the user who originally created the room set the room so that users may only enter via PC or mobile devices.
If you have not been instructed about this,
you must contact the host of the education and ask to change the setting to allow all devices to enter, instead of PC or mobile devices only.