Add error log for check update api.
Add error log for check update api.

alibaba/FlexGW,alibaba/FlexGW,sdgdsffdsfff/FlexGW,alibaba/FlexGW,alibaba/FlexGW,sdgdsffdsfff/FlexGW,sdgdsffdsfff/FlexGW,sdgdsffdsfff/FlexGW