Both crashes are in Waves 9.91, threads 62 and 47 respectively (one exception indicates X-Noise).
You might want to look into how to clear settings/prefs for the plugins (one crash indicates clearly a library).
Or perhaps try and install 9.92. High Sierra is an unsupported OS for 10.5, though.
Ok, after updating Waves to 9.92 everything works as it should.
I’m sorry to spill it here but can’t stand it: It’s a pitty that 10.5 is unsupported OS for High Sierra since all versions of 10s were buggy crap during the whole year. And it is not a nice position to be left with unsupported OS and buggy Cubase.
Anyway 10.5 works fine now on High Sierra and I hope it will be like this at least up to the version 11(when I suppose Steinberg will abandon Mojave).