Blank white page after latest updates

Your theme is doing something wrong. They have basically copied a WPSEO function to the theme and declare it without checking whether the WPSEO one is available. This is bad practice.

They should adjust their code along the lines of:

if( ! function_exists( 'yoast_breadcrumbs' ) ) {
	function yoast_breadcrumbs() {
		// the function
	}
}

Thank you!

You’re right. I just realized that there was a small update available for my theme that fixed the white screen problem. I just had to update the theme and the plugin works again! Thanks for your help.

Glad to hear it ??

reinwp, there is no update for the cityguide theme. See https://docs.woothemes.com/document/retired-themes/. My version is City Guide 1.5.12 Framework 3.7.03. And yours?

The latest version is 1.6.7: https://www.woothemes.com/changelogs/cityguide/changelog.txt

That’s what I updated to.