Rename package name in Android Studio- Error Cannot resolve symbol R solutions

Hello guys, I make videos mostly related to Programming, and sometimes simple tutorial and tricks to survive on Internet .
For change package name in Android studio follow step by step
1) Uncheck the 'Compact Middle Packages'
2) Right click on package then Refactor - Rename
3) Choose the 'In Whole Project'
4) Type the new package name then click on Refactor - Do Refactor
5) Sync Project with Gradle files

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[tgbpdnz]

Thank You Very Much Man.

Love From Heart ❤

[AnkitKumarRavi]

Thank you sir no error show I'm very sad but this video is helpful 👌 ❤🎉

[thewimchester]

I tried this a million times from different tutorials. After refactor I get "Unresolved Reference : String"

The app works before refactor, but gets this error after it. Tried searching all og the internet for it and can't find an answer

[mohamedsayed-efdb]

The resource name must start with a letter