The EULA is downloaded during the synchronization event. If the WSUS Server has items pending in the BITS download queue, it is possible that the EULA file is still pending download.
If there are no items pending download, it's possible that the EULA download was simply not successful. You can execute a refresh on the Content Store by using the command wsusutil reset which should re-queue the download requests for any missing files.
Once the EULA is successfully downloaded, you'll be able to issue the approvals for the update(s).