All... this may sound crazy, but I'm willing to bet that your issue here is a password issue... I know it sounds off the wall right!
I was getting the same errors, however I have 2 units that are identical, one works and the other doesn't, I realized that when I changed the password on the working model to a rather default password of "password" the errors began!!!! As soon as I changed it back to a real password, they both came back to life.
Steps:
1. Go to your browser and enter the IP address of your camera
2. It should ask you for credentials, typically its admin and then your password
3. Click on Maintenance and at the very top is the change admin password option...
I'll let you work the rest out
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BM