Can't access settings? about zappbar

[kmhcreative]

There can be a number of reasons why you'd encounter that error. If this was a fresh install of ZappBar, not an update, you'd have to have FTP'd it to your site so the first thing I'd check is the file permissions. But like I said there are lots of reasons, here's a good article on resolving them:
https://www.hostinger.com/tutorials/fix-sorry-you-are-not-allowed-to-access-this-page-wordpress.

I can tell you that I'm using ZappBar 0.2.5 on my own sites running WordPress 5.2.5 to 5.3.2 without any issues. I haven't been testing it on anything older than 5.0.3 so if you're still running an even older version of WordPress you may have to stick with an earlier ZappBar release.