LVie

I had the same problem yesterday — a similar warning message across the website after updating to WP 4.4. After disabling this plugin, the message disappeared.

One called Juiz Last Tweet Widget.

It was a plugin causing the problem. Now it’s deactivated, the warning message has disappeared. Thanks for your help!

Thank you for all your information. I will work through your list, and hope I find a solution!

Hi there

I have also just upgraded to WordPress 4.4, and have a warning message across the front page (and others) of my site.

Warning: substr() expects parameter 1 to be string, array given in /home/someone/public_html/wp-includes/functions.php on line 1674

Can you please advise what this means, and how I go about removing it?

Thank you!