Yep.. just to be extra clear, as an addon to Tyson's post. If we re-encoded the files for v3.6 with the ioncube encoder for PHP 7.0 or higher, it still would not work. It's not a limitation on the software, Blesta 3.6 will not run under PHP 7. We spent a lot of time and effort with Blesta 4.0 to add support for PHP 7, which included a major framework update.
There's no reason anyone should be running EOL software (See https://docs.blesta.com/display/support/End+of+Life+Policy). I highly recommend upgrading to 4.3.2.