With 4.13.0-2021-03-20 r29789 / 233d7ac, the cropped volume does have the ROI dimensions but is not auto-displayed in the slice views. You can show it using the views’ control widgets. The VTK error you mention does not appear though.
The error message tells that you wanted to store the result of a cropped vector volume (most likely a color image) in a scalar volume. This is not possible.
Currently, the output volume selector only allows pre-creating scalar volumes. I’ll update the output volume selector to allow pre-creating vector volumes and display a more intuitive error message in the module GUI.
For now, if you crop a vector volume then you need to pre-create an output volume elsewhere (e.g., clone the input volume in Data module) or leave the default “Create new volume” setting to let the module create the appropriate output volume type automatically.