Error in exporting game to android

[Ripple]

I tried to export it to android by following a tutorial (https://www.youtube.com/watch?v=dCLYMF32ZBE). However, when at the export screen, I am getting an error saying "Invalid package name. The project name does not meet the requirement for the package name format. Please explicitly specify the package name.
I am sorry if the question is dumb, i am very new to Godot.

[superzikit]

That happened to me too