WD My Cloud Unable to access device. (500) error! Worked great then just stopped! FW V1.03.41

[Ichigo]

Does the problem happen while doing remote access, local access, or both? You can try some of the suggestion on the following link.

http://community.wd.com/t5/WD-My-Cloud/HOW-TO-Troubleshooting-Remote-Connectivity-Issues/m-p/617261/highlight/true#M1130