Error 500 when activate blackfyre

Hi, I have error 500 on my website. I try to upload it with admin panel, FTP, install and activate bbpress and buddypress , woocommerce, visual composer, etc and I have the same issue.

The error I have:
Parse error: syntax error, unexpected ‘if’ (T_IF) in /home/xxxxxxxxxx/public_html/mywebsitewashere/wp-content/themes/blackfyre/pluginactivation.php on line 3

I use: PHP Beautifier to make the php file look better and try finding the issue. Nothing…

The default PHP generate the same error, but on line 1 since it has ONLY 1 line 🙁 🙁

Directl when I tru to activate the theme, my website go into error 500.
This was not supposed to happen.

I have PHP Version 5.6.30.

What I can do? I can’t know that I will have this problem before buying the template 🙁

Thank you in advance and hope I can get an answer as soon as possible.

Maxime.