Skip Navigation


Reported for: Advanced Custom Fields Multilingual 2.0.2

Resolved in: 2.0.4

Topic Tags: Compatibility

Overview of the issue

In ACFML 2.0.0, a fatal error occurs when the user’s admin language is set to French and you attempt to edit a post containing field groups with different translation options:

PHP Fatal error: Uncaught ValueError: Unknown format specifier “t” in …/wp-content/plugins/acfml/classes/Post/MixedFieldGroupModesHooks.php:53


Before applying the workaround, please create a full backup of your website to prevent any data loss or issues.

  1. Go to the …/wp-content/plugins/acfml/languages/ directory.
  2. Look for the file.
  3. Delete it.