This is odd. Here is the ticket I sent to SG support:
“Good morning,
I have just read in the WordPress plugins support area that someone else is also having the same problem. The pop up notifications in SG Optimizer won’t go away. I have 3 sites in my account, but it’s only happening on https://www.thetravellingchilli.com The other 2 are just simple coming soon pages, I turn things on and off and the pop ups go away automatically.
Thing is the notifications initially went away after I updated to the new version of SG Optimiser, but what with a whole bunch of other updates to core, themes and other plugins there must now be some conflict I can’t find. I would like to avoid disabling any plugins, and only do so as a last resort.
Regards,
Sean”
And here is the reply I got about 5 mins later:
“Hello Sean,
Thank you for reaching out to us!
The issue as described was addressed in version 5.0.7. I have cleaned all cache layers from your cPanel -> SuperCacher and the application level cache.
Could you please clear your browser’s cache and re-test to check if the issue persists. If the notices are still present, please provide me with access to the wp-admin dashboard so that I may review the popup live for debugging.
Best Regards,
Kostadin Nanev
Technical Support Team”
I cleared just the cache/local storage/cookies for my website, so I had to log in again, obviously. I figured there was no need to clear my entire browser cache. I’m using Safari 12.0.2 on a Macbook running osX Sierra, if that means anything.