Plugin crashed

Hello,
I used this plugin and worked fine. Before second try of scan I activated one more plugin and site from back-end crashed. I removed manually plugin, site started works fine in frontend and in backend. Now when I activate P3 plugin performance profiler my site will crash in back-end. It’s no matter if this one more plugin which causes crash during second scan is activated or no, in both situation p3 plugin can’t start (white screan). I haven’t any cache plugin activated on my site. I’d like use this plugin becouse it was working great in first time but I don’t know what can I do to activate it.

https://www.ads-software.com/plugins/p3-profiler/