Hello @GCUES ,
The devs are aware of an issue occurring with Read More blocks causing the docked toolbar to appear grayed out and be inaccessible. The issue's been tracked to your account for any future updates regarding it.
While the devs are addressing the issue, you will either need to scroll to the top of your email to access the toolbar for Read More blocks (it's accessible once you've scroll high enough), or you'll need to use regular email, image, and button blocks to manually construct a Read More block.
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