i can't build API 29

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When i click update
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whent i update terminal

Starting from API 19 through API 28, it can still be build normally.

The package name for installing from the command line is “platforms;android–29”.

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I used it, but it didn’t work.

https://stackoverflow.com/questions/43042032/android-studio-fails-to-install-update-error-failed-to-read-or-create-install
Probably you need administrator privileges to be able to create new files in the Program Files directory. Try running CMD as an administrator.