Warning: Parameter 1 to plgVmShipmentWeight_countriesstates::plgVmOnSelectCheckS

[theopap]

Hello

I am geting the following errors after the client completes an order.
I would like your help on how to fix this

Warning: Parameter 1 to plgVmShipmentAcscourier::plgVmOnSelectCheckShipment() expected to be a reference, value given in /home/...../public_html/libraries/joomla/event/event.php on line 70

Warning: Parameter 1 to plgVmShipmentWeight_countriesstates::plgVmOnSelectCheckShipment() expected to be a reference, value given in /home/..../public_html/libraries/joomla/event/event.php on line 70

Warning: Parameter 1 to plgVmShipmentWeight_countries::plgVmOnSelectCheckShipment() expected to be a reference, value given in /home/..../public_html/libraries/joomla/event/event.php on line 70

Thanks in advance

[Jumbo!]

These are warning messages, not errors. Which version of VirtueMart are you using?

The three shipping plugins installed on your site are causing these warnings. Two of them are third-party extensions. If you've installed the latest version of VirtueMart, the last warning should disappear. For the other two, you will need to contact the respective developers for assistance.