Hello,
We’re sorry to hear that you’re experiencing this issue. The warning you’re seeing is likely due to a conflict with the canonical.php file in WordPress core. This can sometimes happen when there are compatibility issues between WordPress and other plugins or themes.
To resolve this, we recommend performing a conflict check on your website using the Health Check plugin. This will help us determine if the warning is caused by a conflict with another plugin or theme.
Here are the steps to perform a conflict check using the Health Check plugin:
- Log into your WordPress Administrator account and navigate to the dashboard.
- Go to the Plugins section in the WordPress menu and then click on Add New.
- Search for “Health Check & Troubleshooting” and install the plugin.
- Activate the Health Check & Troubleshooting plugin.
- On the WordPress Menu, hover over Tools and click on Site Health.
Performing these steps will help us identify if the warning is caused by a conflict with another plugin or theme. If you’re still facing issues after performing the conflict check, please let us know, and we’ll be happy to assist you further.
If you have any other questions or need further assistance, feel free to reach out to our dedicated support team here.
We appreciate your understanding and patience as we work to resolve this issue for you.
Sources:
How to Fix Undefined Offset: 0 Warning » Rank Math
Rank Math Sitemap Issues and Their Fixes » Rank Math
Confirming a Theme/Plugin Conflict With Rank Math
How to Fix “Sorry, This File Type Is Not Permitted for Security Reasons” Error » Rank Math
Hello,
Could you please share the PHP version you’re using on your site?
We have asked since we recommend updating your PHP version to PHP 8.0 because anything below that has reached its end of life:
https://www.php.net/supported-versions.php
Let us know how this goes.
Hello,
It is possible that your Rank Math plugin is outdated. Please ensure that you are using the latest version of Rank Math plugin. If not yet, please do update them. You may refer to our changelog page here: https://rankmath.com/changelog/
If the issue persists, we might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress login in the designated Sensitive Data section.
Please do take a complete backup of your website before sharing the information with us.
It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
We really look forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.
