I can't preview messages in Gmail anymore

I used to be able to get a panel next to the selected message but it seems that something has changed in Edge,
When I try it, I see the panel that says one message is selected. But no data is shown.

Out of curiosity, I just tried it with Chromium, I got the same panel but it asks me to make an account and login to cloudHQ before the message preview is enabled.
Is that a new fruit(cake) or what? And why Edge doesn't show the data but never refers to cloudHQ?

Thanks in advance for any clarification.

I'm not sure, but it sounds like "preview messages" is something to do with the cloudHQ browser extension. Is that what you're trying to fix, or do you want Gmail's standard functionality with its reading pane next to the messages? If it's the latter then go into your browser's extensions section and disable anything called "cloudHQ" or any other extension that refers to Gmail. Press F5 to refresh the Gmail page and see if that's fixed it for you.

Hello! Take a look here also: In Chrome, go to the gear, & check to see if your Inbox, Reading Pane, Show Reading Pain is checked?