I get this error form the functions.php file How can I fix it?

Error Level: E_DEPRECATED Message: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated File: wp-includes/functions.php Line: 2182 Request: /wp-admin/options-general.php?page=fluent-mail

1 Answer 1


It looks like an error message from the 'fluent mail' plugin. So you need to contact the plugin support page.

  • I think it just caused it but the error is not on their side, it is in the functions.php file
    – AYNTK
    Aug 19, 2023 at 19:19
  • The plugin is calling a function that is defined in the functions.php file, and that call is not being done properly. Still think it is in the plugin. Disable the plugin and see if you get the same error. Aug 20, 2023 at 1:51

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