I've used this module for a couple years now. And while it's always been a little quirky and disappointed me that it greatly slowed down the load time on my site, it gave me the visual display that I wanted.
Recently, out of the blue (without making any updates or changes), it crippled my site. The front page refused to load, and returned an error 500. I've tried troubleshooting for the past couple weeks - clearing the cache and disabling other modules - but the only thing that would allow the site to load was disabling Simple RSS Feed.
I'm afraid it seems this module still needs some work. Until then, I'm forced to find something else.