If you're getting a blank screen, most probably it could be a PHP fatal error. Please enable WP_DEBUG mode on your WordPress and re-visit your page to see if you're getting any PHP error messages. To enable WP_DEBUG mode, you can refer to the following resource (https://codex.wordpress.org/WP_DEBUG).
If you see any error related to PHP memory such as running out of allocated memory, you can follow our guide on how to increase memory limit (https://theme.co/apex/forum/t/troubleshooting-increasing-php-memory-limit/16935).
Please make sure to clear all caches when testing your issue again (https://www.wpbeginner.com/beginners-guide/how-to-clear-your-cache-in-wordpress/).
If you're still having issues, please provide us with your WordPress login credentials in a secure note to check your issue further.