this is most likely a security issue, e.g. you do not have access to the PI Server. Usually this issues are handled by our techsupport team.
Possible solutions could be setting up a trust or an mapping.
The "Time invalid" error is an issue that may be seen with PISDK 1.3.6 to 1.3.8. It has to do with the wrong description being inherited by a later call. PISDK 1.4.0 should clear the error properly.
As Andreas mentions, our techsupport can dig through the connection issues for your site.
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