R cannot be resolved to a variable (solved)

Can you please explain with audio

yeah, that was the error, the package naming, i changing later the package name... BIG MISTAKE, idk why this video has so many dislikes

still cant !!! fuck lah...

give me your whatsapp number

Another way without deleting package just right click on package in "src folder" -> Refactor -> Rename.
and rename it like name of package in "gen folder"