I meet the same problem. I installed it and when I tried to open it says the network connection has an error. But the connection works and I can use all other websites.
(Please start new threads for new issues — it doesn't sound like your question is related to the other thread at all. I've moved this to a new thread.)
What's the exact error you're receiving? If you're talking about a message within Zotero itself saying "Error connecting to server. Check your Internet connection.", see Connection Error.
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What's the exact error you're receiving? If you're talking about a message within Zotero itself saying "Error connecting to server. Check your Internet connection.", see Connection Error.