I've bought e-books from website whose network is probably in Thailand (because it's a Thai publisher). Then trying yo upload Epub file of e-book into my Adobe Digital Edition.
I have adobe id and have authorized it with the computer already.
I'm using Opera to download content and Window 7 as a system.
Every time I try to download e-book to my computer, it said Error getting License. License Server Communication Problem: E_STREAM_ERROR:" and I have no idea why.
I tried to close my firewall and anti-virus software, but there's no use.
Temporarily disabling your internet security software was the correct first step.
If the error persists, and you're not using a VPN client or connecting to the internet via a proxy server, the issue likely stems from issues accessing the remote server where the content is sourced to.
You may try accessing from a different pc (ideally, on a different ISP or network) just to be sure. But there is also a real possibility that, if the issue does stem from the vendor, you may not be able to access this title and should seek a refund for your purchase.