In Windows 7 pro, 6.1 (Build 7601: SP 1)

Using Zotero Stand alone 5.0.24 we get error message:
"Error connecting to server. Check your Internet connection."

Sync works in Chrome Zotero Connector 5.0.26

proxies.autoRecognize false
proxies.clientChecked false
proxies.disableByDomain false
proxies.disableByDomainString .edu
proxies.proxies []
proxies.showRedirectNotification false
proxies.transparent true

but the about:config in Zotero Stand alone looks different.
How should it be configured or is there something else to do?

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error message:

[JavaScript Error: "The connection was refused when attempting to contact wss://stream.zotero.org/."]

[JavaScript Error: "WebSocket connection closed: 1006 "]

[JavaScript Error: "The connection was refused when attempting to contact wss://stream.zotero.org/."]

[JavaScript Error: "WebSocket connection closed: 1006 "]

[JavaScript Error: "HTTP POST https://repo.zotero.org/repo/updated?last=1508630400&version=5.0.24&m=3 failed with status code 0"]

[JavaScript Error: "Error connecting to server. Check your Internet connection."]

[JavaScript Error: "Error connecting to server. Check your Internet connection."]

[JavaScript Error: "The connection was refused when attempting to contact wss://stream.zotero.org/."]

[JavaScript Error: "WebSocket connection closed: 1006 "]

[JavaScript Error: "Error connecting to server. Check your Internet connection."]

[JavaScript Error: "Error connecting to server. Check your Internet connection."]

[JavaScript Error: "The connection was refused when attempting to contact wss://stream.zotero.org/."]

[JavaScript Error: "WebSocket connection closed: 1006 "]

version => 5.0.24, platform => Win32, oscpu => Windows NT 6.1; WOW64, locale => en-US, appName => Zotero, appVersion => 5.0.24, extensions => Zotero LibreOffice Integration (5.0.6.SA.5.0.24, extension), Zotero Word for Windows Integration (5.0.5.SA.5.0.24, extension), Shockwave Flash (9.0.45.0, plugin), Shockwave Flash (25.0.0.171, plugin)