If you see WordPress White Screen of Deatherror on your screen, then this could be a PHP memory-related issue. Sometimes, when the memory gets exhausted, users witness this sort of error on the screen. However, this could easily be resolved by following some of the easiest troubleshooting solutions. The first and foremost thing that you should try is disabling the plugins as they can interrupt the functioning of WordPress. So, make sure to disable all the plugins one by one temporarily to fix this error.
If it doesnt work, then you could try switching to the default WordPress theme. You can do this by accessing the admin area. Now, go to the Appearance option to look for the Themes. In your dashboard, select the default themes. Another solution is clearing the cache of the web browser and plugins.