Add Troubleshooting entry for mount failure

README.md

@@ -122,6 +122,15 @@ excellent tutorial.
 
 ## Troubleshooting
 
+### `parsl-init-script` ConfigMap fails to mount
+
+```bash
+MountVolume.SetUp failed for volume "parsl-init-script-volume" : object "qgnet"/"parsl-init-script" not registered
+```
+
+Only occurs when also mounting a PVC. _TODO: How to resolve?_
+
+
 ### Cleaning up failed parsl pods
 
 Some failure states result in pods getting stuck in a restart loop that do not
@@ -137,6 +146,7 @@ To remove a pod that is stuck:
 kubectl delete pod {pod-name}
 ```
 
+
 ### File not found error starting Rancher Desktop
 
 You must have a valid `$KUBECONFIG` path. Paths including `~` or paths to files which do