You can upgrade to 9.0.3 (and then there is a consolidated hot fix - 9.0.3.2 - that can be installed).
If you wait a day or two, NIOS 9.0.4 should be released in the first week of June but you might not want to install it until it has been out for a month or so "just in case".
Be sure to read the release notes carefully to ensure that release works for you as it a recommendation cannot be made without a full undersanding of your Grid. Pay particular attention to the notes about certificates. If you are using a HTTPS or CA certificate that is not fully RFC compliant, the distribution and/or upgrade will fail.
