Exception in checkout when fallback carrier is applied.

[iwanzijderveld]

When I complete an order and go to the success page, I get the following error:
(Exception(code: 0): Deprecated Functionality: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/vendor/shipperhq/module-shipper/src/Helper/Data.php on line 344

It appears that when a fallback is used the $shippingRate->getCarrierType(); in \ShipperHQ\Shipper\Observer\AbstractRecordOrder::getDefaultCarrierShipMethod returns null. And passing null to array_key_exists has been deprecated.

[shqsupport]

Hello @iwanzijderveld,

Thank you for flagging this, and for including the error logs and file paths, they were helpful in pinpointing the issue.

Our engineering team has this queued for a fix in an upcoming release, and we'll let you know as soon as the update is available.

Thanks,
ShipperHQ Support Team