TransferOutBeforeUpgrade Error messages during installation

Hi

Tried to install yith-woocommerce-catalog-mode.1.6.0.zip to wordpress 4.9.6

the following are the error messages:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'TransferOutBeforeUpgrade' not found or invalid function name in /home/web/website.com/wp-includes/class-wp-hook.php on line 286

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'TransferInAfterUpgrade' not found or invalid function name in /home/web/website.com/wp-includes/class-wp-hook.php on line 288
Plugin installed successfully.

Should I be worried? consider it is a warning message

• This topic was modified 6 years, 9 months ago by televisi.