Drupal can be an absolute mess to work with sometimes, especially when new to it. And generally speaking, you’ll encounter the White Screen of Death at least once in your Drupal experience if you do any sort of module or theme editing / creation.

Luckily, it can be easy to fix. Just follow the below steps and pray that things go well!

1) Rename your theme or module / plugin / extension that is causing the issue
2) Load PHPMYADMIN or whatever medium you use to access your database
3) Run the following

DELETE FROM cache;

Hopefully, your problem is fixed.