Solution 1
Enable Browser Emulation Feature on the computer where Web Client is installed.
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Open Registry Editor and navigate to the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\InternetHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATIONExplorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
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Set the value NiceLabelWeb Client.exe: (REG_DWORD): Hex: 2af8 (decimal: 11000)
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Restart Web Client.
Solution 2
Settings on a Proxy server between your system and authentication server can block Google authentication. Check the settings on the Proxy server.
Solution 3
Make sure that JavaScript option is enabled in Internet Properties.