Error getting license. License Server Communication Problem: E_ADEPT_NO_FULFILLMENT_RESULT

Hi, I am trnsferring bought ebooks (.acsm files) from PC into ADE library to then pass them to ereader.

And for the first time i have this error message. I have done all, de-authorize and re-authorize the PC, got the files reloaded by the provided and I uploaded them again , ADE de installed and re installed but nothing seems to work.

I have nearly 200 ebooks and never had the problem so far.

Thanks for help!