E_ACT_TOO_MANY_ACTIVATIONS

I have tried to download an e-book and got the message E_ACT_TOO_MANY_ACTIVATIONS.

This  Adobe help page shows me  E_ACT_TOO_MANY_ACTIVATIONS error in Adobe Digital Editions pls. contact us.

I tried this and oppened a chat but I was told they can not help me. I need to go to this forum, they can help.
"I can understand the situation, I have discussed with my senior as well, we would not be to fix this. The support is not available on the chat, but over the forums."

So pls. can you help me? to get the activation count reset.

Thanks