what inherit to use for com.google.gwt.dev.shell.remoteui.MessageTransport.RequestException?

Error is :
00:00:16.998 [ERROR] Line 190: No source code is available for type
com.google.gwt.dev.shell.remoteui.MessageTransport.RequestException;
did you forget to inherit a required module?

My inherits include what I see as needed:
<inherits name="com.google.gwt.xml.XML" />
<inherits name="com.google.gwt.http.HTTP" />

Code commited here:
To git@github.com:h4ck3rm1k3/GWTOsm.git
d6cde1c..55e1c13 master -> master

can you tell me what inherit to use for
com.google.gwt.dev.shell.remoteui.MessageTransport.RequestException?

testing in devmode.
thanks,
mike

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