there was a bug in the software where if you recorded a file in the recorder with zero channels (if you forgot to ARM any channels), and then load the file into the sampler, it would crash it or you would get this popup dialog box. This should have been fixed now in the new release, zero channel files are now no longer loaded -
Other than that, I agree that the popup dialog box error handling is a bug / problem that has to be fixed. We will change this to use bubble popup messages instead, which are non blocking, like in the case when you save a preset and it says “saved preset #0” for example.
I also updated the recorder menu information / manual page just now -