https://www.4byte.directory/submit: Server Error (500) when entering hex number

I inadvertently tried to enter a hex signature via https://www.4byte.directory/submit
(for example 0x12345678)
Then I got the error : Server Error (500)

Later i realized i should have entered the function, but i was confused for a while.
If would help if the description was more clear and/or an appropriate error message is given.

I believe this is the correct place to start if someone wants to work on this

ethereum-function-signature-registry/func_sig_registry/registry/views.py

Lines 85 to 97 in def6c03

    
           def post(self, *args, **kwargs): 
        
               serializer = self.get_serializer(data=self.request.data) 
        
               if not serializer.is_valid(): 
        
                   return Response({'serializer': serializer}) 
        
               signature = serializer.save() 
        
               messages.success( 
        
                   self.request._request, 
        
                   "Added signature '{0}' for function '{1}'".format( 
        
                       signature.bytes_signature.get_hex_display(), 
        
                       signature.text_signature, 
        
                   ), 
        
               ) 
        
               return redirect('signature-list')

	def post(self, args, *kwargs):
	serializer = self.get_serializer(data=self.request.data)
	if not serializer.is_valid():
	return Response({'serializer': serializer})
	signature = serializer.save()
	messages.success(
	self.request._request,
	"Added signature '{0}' for function '{1}'".format(
	signature.bytes_signature.get_hex_display(),
	signature.text_signature,
	),
	)
	return redirect('signature-list')