Server Error 500 on Themes page after plugin is enabled

Hi there!

We’re running a WordPress multisite with over 3500 sites and over 100 themes.

Server load is low, consistently under 1.0, plenty of RAM and CPU.

Enabling the plugin is no problem.

But after I enable it, going to the Themes page… it just spins and spins… and after a while – maybe a minute – my browser shows a server error 500 on a white screen. 🙁

The plugin DID work for a while when we had less sites – maybe back when there were only 1200 to 1800.

My question is this – could there be something in the code that would time out or really struggle for resources with a high number of sites – coupled with over 100 themes?

Maybe even something introduced in recent versions, say a year ago or so?

** having the exact same problem with the Plugin Stats plugin – it got slower and slower over time, now it doesn’t work at all anymore.

Both these plugins are super useful when managing a multisite, we’d love to get them working again. 🙂

Thanks!

https://wordpress.org/plugins/wpmu-theme-usage-info/