Maybe this helps:
https://www.liquidweb.com/kb/apache-err ... nd-solved/
Upgrading to PHPBB3.1
Forum rules
READ: phpBB.com Board-Wide Rules and Regulations
NOTE: phpBB 3.1.x is at its End of Life stage and support will NOT be provided after July 1st, 2018.
READ: phpBB.com Board-Wide Rules and Regulations
NOTE: phpBB 3.1.x is at its End of Life stage and support will NOT be provided after July 1st, 2018.
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</Solidjeuh>
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cybertroner
- Registered User
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- Joined: Fri Dec 30, 2016 3:24 pm
Re: Upgrading to PHPBB3.1
Oh yeah I solved the problem! I don't know why but index.php file vanished from root directory I reuploaded it and everything is working! Going to install the style 
Thanks everyone who helped me
Thanks everyone who helped me