What Encryption Key?!

I have the same problem. Suddenly is asking for encryption key which I have never set. I deleted the computer from the backup set and started over. That worked for a bit and then it started asking for the encryption key again. Deleted again and started over, this time with an encryption key. Again it worked for a bit and now it is asking for the key. Always responds saying it is incorrect. I back up four computers, this problem so far has always occurred on the same computer. All computers are Windows 7 64-bit. If I use a different computer to look at the backup files online, when looking at the problem computer it asks for the encryption key. Inversely, the problem computer is able to look at the backups of the other computers with no problems.
I like the program, but not when it's broken. Please fix it.

I also have the same problem. So far, I have worked with two Acronis personnel. The first time, we removed all of my storage on three computers and I used a new encryption key and restored all of my data overnight. The encryption problem reappeared the next morning. The server would not honor my new encryption key or my old one.

The second time, we removed all of my data, I specifically did not use an encryption key, and then I restored the data overnight. The next morning, the server asked for my encryption key again.

I am running two computers on Windows 7 and one on Windows XP.

I have a fourth computer that works just fine with an encryption.

I also love this program but can't use it.

Kudos to Acronis for refunding my subscription fee for online backup. I will continue to use their True Image Home product, as I have for years, but NOT their online backup service. It's doesn't meet the high standard I expect from Acronis. Perhaps someday they'll work out the bugs.