The message HTTP 403 "Forbidden" when accessing your home page is caused by file system permissions. Even though all users should have Read permission for the directories and files that you have created in your public_html directory there may be a problem with the permissions depending on when the files were created in the home directory.
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If you set the permissions in a Linunx Linux environment, you must set them right every time you create new files.
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find ~/public_html -type d -exec chmod 755 {} \;
find ~/public_html -type f -exec chmod 644 {} \;
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If the webpage is not visible, execute-rights 
are missing from "Others" group. Execute-rights must be both in public_html and home drive flders:
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chmod o+x ~
chmod o+x ~/public_html
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The above code should fix the visibility problems and make your webpage accessible again.