"Not enough DSP resorces"

Hey guys, I tried to use dspMixFx to distort my guitar. However, in some settings it says, if I try to add “lead”, “drive” or “crunch” that the DSP has not sufficient resources and that I use too many channels or something like that. So I found out that it rather works when setting sampling rate to 44khz rather than 192khz. What factors affect if the DSP can handle the “lead”, “drive” or “crunch”, other than the sampling rate (buffer size, latency mode etc,) and how can I predict if I chose the correct values?

I got this too, disabling the loopback mode made the amp classics available for me