I bet you are getting that error when you are launching the local web under DV920. You would need to make sure you are logging into JDV920 instead of DV920 on local web. Override the environment when ogging into local web. The explanation of why you need to log in to JDV920 is given in the document below on MOS.
AIS How To Connect AIS Server From a Local WebDev Client (Doc ID 2515375.1)
Hope this helps.
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Excerpts from the Doc id:
Log into JDV920. Otherwise it doesn't work.
AIS is pointing to the HTML server. So the direction is like this: Webdev-->:AIS-->JAS. Since JAS doesn't allow you to login to DV920 environment, it is not possible.
If you want everything local, then you must have a dedicated AIS server for the fat client.
Configure your AIS server to point to your developer's fat client machine (
http://localhost(machinename):9200), then it allows you to login to DV920.