Notice: The register_taxonomy function was not called correctly. Taxonomy names must be between 1 and 20 characters?

Question

WordPress

Hello! The question is. When transferring to another hosting, the following error occurred:
Notice: The register_taxonomy function was called incorrectly. Taxonomy names must be between 1 and 20 characters long. More information can be found on the Debugging in WordPress page. (This message was added in version 4.2.0.) in /var/www/vh334307/data/www/retrolebedeva.ru/wp-includes/functions.php on line 4986
Copied a piece of code:

if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true, $function, $message, $version ) ) {
    if ( function_exists( '__' ) ) {
      if ( is_null( $version ) ) {
        $version = '';
      } else {
        /* translators: %s: Version number. */
        $version = sprintf( __( '(This message was added in version %s.)' ), $version );
      }
      $message .= ' ' . sprintf(
        /* translators: %s: Documentation URL. */
        __( 'Please see <a href="%s">Debugging in WordPress</a> for more information.' ),
        __( 'https://wordpress.org/support/article/debugging-in-wordpress/' )
      );
      /* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message, 3: Version information message. */
      trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
    } else {
      if ( is_null( $version ) ) {
        $version = '';
      } else {
        $version = sprintf( '(This message was added in version %s.)', $version );
      }
      $message .= sprintf(
        ' Please see <a href="%s">Debugging in WordPress</a> for more information.',
        'https://wordpress.org/support/article/debugging-in-wordpress/'
      );
      trigger_error( sprintf( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s', $function, $message, $version ) );
    }

Line 4986 - trigger_error( sprintf( __( '%1$s was called incorrectly. %2$s %3$s' ), ​​$function, $message, $version ) );
Please help me fix the error. Thanks in advance!