I didn’t realize that I shouldn’t edit the Newsletter dedicated page, so I added some content there. Since then I obviously have problems as the dedicated page is not showing service messages anymore. I cannot come back to previous version, as it’s not saved in WordPress and even uninstalling and reinstalling the Newsletter plugin didn’t help. Could you please help me and let me know what should I do to get the basic settings on this page again?
Thank you in advance for your help!