I am using the legacy editor, as the GrapesJS editor has some bugs. I am not sure if this one is also a bug of the GrapesJS plugin…
Anyway:
have you tried to clic “Save” instead directly on “Save and Close” ?
have you tried to refresh the page before creating a new email ? (please try saving the newly created email in max 9 minutes after the refresh, otherwise you are signed-out of Mautic)
have you tried to clear the cookies on the browser or to use incognito mode to test ?
Your problem is not the sending, as you mentioned in the title, but in saving the email.
Can you be more specific? Is it MySQL? MariaDB?
I use 10.3.38-MariaDB-0ubuntu0.20.04.1
Could it be a database issue? That mautic cannot access the database to create de email?
Can you create something else, like a contact, campaign, segment, tag ?
Hello @szilard21 , do you have any emojies in your email?
Also: can you plz check if there are multiple html tags at the front of the code?
One more idea: could you plz check the log (fogaskerek, beallitasok, log)
Thx