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Folder Permissions

This extension solves OpenCart 3x, gives folder permission and solves this error:

I tried to upload my extension with Extension Installer, but I got this error:
The directory catalog/controller/myfolder is not allowed to be written to!
and
The directory system/engine/ is not allowed to be written to!
How can I upload my controllers and my custom base controller?
Which folders are allowed to add files?

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