Hello
I have the same issue with a Presta 1.7.8 Multishop. I have tried many things :
- empty cache
- uninstall/reinstall from zip file or directly in the ftp
- tried also an older version (1.5.1)
All this has been unsuccesfull and highly frustrating : I can install the module, but not enter in the configuration : "Page not found" "The controller AdminLiteSpeedCacheConfig is missing or invalid".