Password-protected post page generates critical errors

Hello everybody,
I have had a problem with the member page of our HP for 2 days. As soon as you go to the login page there is a message with a critical error, I take out the password in WordPress and make the page public, the error is no longer there, just as if I activate another theme. I hope you can help me, thank you
The WordPress Mail bug report
Error Details
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An error of type E_COMPILE_ERROR was caused in line 25 of the file /mnt/web304/a3/86/510067086/htdocs/WordPress_SecureMode_01/wp-content/themes/rife-free/functions.php. Error message: require_once (): Failed opening required ‚/mnt/web304/a3/86/510067086/htdocs/WordPress_SecureMode_01/wp-content/themes/rife-free/advance/class-apollo13-framework.php ‘(include_path =’. / opt / RZphp73 / includes’)

Theme deactivated and deleted, Apollo13 plugin deleted and both reinstalled afterwards.
Unfortunately did not improve, error continues to occur.
Errors only occur with the Theme Rife free, it does not matter whether a plugin is active or not. But have the Rife free theme from the beginning and there was also the password-protected page.
Excuse my english, have everything translated by google
Greeting Stephan

The page I need help with: [log in to see the link]