WordPress caught an error with your theme, Customizr Pro

Hi

My site is built with Customizr Pro version 2.1.31
Running on WordPress version 5.2.2
Using PHP version 7.3.6

My site randomly displays ‘this site is experiencing technical difficulties’ and wordpress has sent an email with the error message below….

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Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with your theme, Customizr Pro.

Error Details
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An error of type E_COMPILE_ERROR was caused in line 1071 of the file /home8/yoursite/public_html/yoursite/wp-content/themes/customizr-pro/core/init-base.php.
Error message: require_once(): Failed opening required ‘/home8/yoursite/public_html/yoursite/wp-content/themes/customizr-pro/core/core-functions.php’ (include_path=’.:/opt/cpanel/ea-php73/root/usr/share/pear’)

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Please advise how to remedy this error.
Thank you, Michele