Cannot update Headers; WordPress 4.5 issue?

Hi there!

What is the exact message of the fatal error? It may give us a hint about where the error may be coming from.

Also, have you tried disabling your plugins, and/or swapping to a different theme (preferably one of the TwentySomething themes!)?

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 3200 bytes) in /home/sanderskennels/public_html/wp-admin/includes/deprecated.php on line 1274

Thanks for your help. This is the error message

I have not tried swapping themes, or disabling a plug in. I did not create our website and have lost the employee that managed it. I have just been updating the site. I am not incredibly familiar with WordPress

That’s okay!

So that error is related to the memory of the server your site runs on, and it looks like there’s something going on that’s causing it to run out of memory (which, currently, seems to be limited to 64 Megabytes – a little on the low side).

Unfortunately, at this point it could be coming from anywhere and there are also several ways to solve this. You will want to refer to a developer to do an assessment of the plugins and the theme that are being used on the site to ensure that there are no memory leaks there.

For the time being, would you be okay to find the wp-config.php file on the server (through FTP, or through your hosting provider’s file manager) and adding the following line near the top of the file (for example, just above where it says “/* MySQL settings */”)?

define('WP_MEMORY_LIMIT', '128M');

Alternatively, you could talk to your host about this and ask them to increase the memory limit on your site.

This was helpful, Thx