Try it and see what happens.
Covered in the manual - even including a picture and an explanation which effect types can be included and which cannot. If you are intending to create PROFILEs, then read the related chapter in the Main Manual
It is possible to profile an amp with fuzz pedal but the results are not great. This is my only gripe with Kemper. The fuzz sound is created by square wave clipping. And Kemper is unable to profile it the right way and the resulting profiles are sounding more like a distortion then fuzz. I have tried really hard to make it work, even used "a debuffer" pedal to increase the impedance going from kemper to the different fuzz pedals but the results were the same. I had some minor success with profilling a bigmuff pedal because it is more a hybrid between distortion and fuzz then a pure fuzz sound. This is one of a few limitation of the profiling process that I found.
But all is not lost and you can get a really nice fuzz sounds out of Kemper by using the Kemper fuzz effect in the Stomps section. So this is the way for me to enjoy the warm fuzzy heaven with my beloved Kemper 
I did that, and the result is very fuzz dependent. if your fuzz is very vintage, the result is not the best at list in my experience.
