flask run on 80 PermissionError: [Errno 13] Permission denied code example
Example: PermissionError: [Errno 13] Permission denied on flask
if__name__=='__main__':
app.debug=True
app.run('0.0.0.0', port=5001) #port can be anything higher than 5000.
#this solution is for an OSError and PermissionError
#Make sure to run it on a virual environment for Flask, Python.