I tried playing around with Lightning Message Services as per the release note. Created a LWC to publish message on the message channel, and a VF page to listen to it. Also the other way around. I am not able to receive or view any messages on either side, when I subscribe to the channel. I am simply following the example given on the release note (https://releasenotes.docs.salesforce.com/en-us/spring20/release-notes/rn_lc_message_channel.htm). Has anyone done this successfully?