Frequent passenger internal server error. Help!

I keep getting a screen that says “The application spawner server exited unexpectedly”

Here’s a screenshot:

Interesting point of note: while the page usually takes 5-15 second to show up, on the times you get this error, which happens at random, it appears immediately. As stated in my other thread, I definitely need to clean up my code as it’s quite messy, but if anyone has any thoughts on what exactly could be causing this error so I can be sure to tackle it, I’d be much obliged.