I believe we do not support GUI-based viewers like pm4py.visualizer.view(gviz), which tries to open a file using your system's default image/PDF viewer.

Could you try visualizing and then saving the output - 

import pm4py
# Sample log (replace with your own)
log = pm4py.read_xes("/dbfs/tmp/example.xes")
dfg = pm4py.discover_dfg(log)
# Create visual object
gviz = pm4py.visualization.dfg.visualizer.apply(dfg, log=log)
# Save the image to DBFS
pm4py.visualization.dfg.visualizer.save(gviz, "/dbfs/tmp/dfg_output.png")

Then displaying the output in the notebook - 

displayHTML("<img src='/files/tmp/dfg_output.png'/>")