Hello,
We apologize for the inconvenience you’re experiencing with the robots.txt file. To fix the “robots.txt file is not writable” error, you can add the following code to your site. This will allow Rank Math to edit your robots.txt file:
/**
* Allow editing the robots.txt & htaccess data.
*
* @param bool Can edit the robots & htacess data.
*/
add_filter( 'rank_math/can_edit_file', '__return_true' );
If you’re unable to access your wp-config.php file, you should contact your host for support. If you can access it, search for the code define (‘DISALLOW_FILE_EDIT’, true); and replace it with define ('DISALLOW_FILE_EDIT', false); or add it if it doesn’t exist.
You can find more details in this guide: Common robots.txt Issues & How to Fix Them.
Let us know if you need further assistance!
Sources:
Common robots.txt Issues & How to Fix Them » Rank Math
I Can’t Edit My Website’s Robots.txt » Rank Math
