[Resolved] As soon as I change the headers config, I get this message

Hi.

We need to replicate this issue on a fresh WordPress installation. Then I'll be able to escalate it to our compatibility team. For this, I created a test website with a clean WordPress install. You can access it through this link:

-site removed--

With this link, you'll be directly logged in.

Could you please install the https://wordpress.org/plugins/http-headers/ plugin and see if the issue is replicable on a clean WordPress installation?
Please configures WPML and WooCommerce as it is set on your site (just the basics usually is enough).
Please also make sure that you are installing the latest version of the plugin.

When everything is finished, and you can replicate the problem, please let me know.

Thanks,
Itamar.

Hi, Alex and thanks for installing the plugin on the test site.

I'm sorry but I'm not familiar with this plugin and how to configure it.
Can you please explain the step by step process that I need to do in order to replicate this critical error?

Thanks,
Itamar.

Hi and thanks for the extra details.

I've escalated this issue to our compatibility team and they will debug it and try to find a fix for it. If we would not be able to fix this issue only from our side, we might need the cooperation of the author of the plugins. It would be great if you could contact the authors and urge them to join our Go Global Program. You can find details about it here.
https://wpml.org/documentation/theme-compatibility/go-global-program/
We will be happy to cooperate with the authors in making their plugin officially compatible with WPML.

In any case, I'll keep you updated here when I have news from our compatibility team regarding this issue.

Thank you for your patience.
Itamar.

Hi,

Our compatibility team has found a fix for this issue. Here is what you need to do.

1. Take a backup of your site in case something goes wrong.

2. Edit with code editor the following file in the HTTP Headers plugin folder.
/wp-content/plugins/http-headers/http-headers.php

3. Replace the following lines 1417/1418

add_action("added_option", 'http_headers_option');
add_action("updated_option", 'http_headers_option');

with:

add_action("added_option", function() {
     add_action('admin_init', 'http_headers_option');
     add_action("updated_option", 'http_headers_option');});

4. This should solve the fatal error issue when saving the HTTP Headers options. It work for me on the test site.

Can you please check if it works for you as well?
If it does you can share it with the plugin's author.

Regards,
Itamar.