Hello,
1) We can’t install or update any theme or plugin via Dashboard http://prntscr.com/ktgmjb
2) I have activated WooCommerce plugin with the default theme and got 500 error. I think problem is related to your server settings if you can’t use the WC plugin even with the default WP theme.
So, please, contact your hosting provider and solve the mentioned problems with the default WP installation first and then contact us and we’ll check the issues related to our theme.
Regards