Sylvain,
The yellow bar still exists on all my admin pages – but when I click the link I get taken to a blank admin page showing only the yellow bar and the side-bar (Example: https://imgur.com/a/aCQCW )
I haven’t got any special characters in the settings. I’ve tried several times to recreate the problem. After I save my settings (Name, Email, API Key) then clicking ‘Add this email’ the screen refreshes and I get taken to the blank page – then I am unable to access the settings anymore – until I remove the record on the wp_options table.
Image 1. Dashboard showing the link
Image 2. After I click “save” – API details, Name & Email entered
Image 3. The page after I click “Add email” or the settings link