Title: Premature textdomain loading causing “headers already sent” errors
Last modified: August 8, 2026

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# Premature textdomain loading causing “headers already sent” errors

 *  [Polaris](https://wordpress.org/support/users/namrur/)
 * (@namrur)
 * [6 days, 10 hours ago](https://wordpress.org/support/topic/premature-textdomain-loading-causing-headers-already-sent-errors/)
 * Hello,
 * While debugging our WordPress environment during checkout and API requests, we
   encountered the following notice originating from your plugin:
 * Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation
   loading for the mxchat domain was triggered too early. This is usually an indicator
   for some code in the plugin or theme running too early. Translations should be
   loaded at the init action or later.
 * Impact: > Because text domain loading is triggered before the init action, it
   outputs a PHP notice prematurely. This causes HTTP headers to be sent too early,
   breaking subsequent REST API and AJAX responses (such as payment processing and
   checkout requests) and triggering “headers already sent” warnings site-wide.
 * Requested Fix: > Please ensure that all translation files and text domains are
   loaded strictly on or after the WordPress init action hook.
 * Thank you!

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 * ![](https://ps.w.org/mxchat-basic/assets/icon-256x256.png?rev=3267273)
 * [MxChat - AI Chatbot & Content Generation for WordPress](https://wordpress.org/plugins/mxchat-basic/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mxchat-basic/#faq)
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 * 0 replies
 * 1 participant
 * Last reply from: [Polaris](https://wordpress.org/support/users/namrur/)
 * Last activity: [6 days, 10 hours ago](https://wordpress.org/support/topic/premature-textdomain-loading-causing-headers-already-sent-errors/)
 * Status: not resolved