I have installed the Parcel2Go plugin and am editing the settings page for the collection/return address and I cannot select the UK as the country dropdown is not being populated – looking at the source I see the following message in the markup:-

Warning: Invalid argument supplied for foreach() in wp-content/plugins/parcel2go-shipping/parcel2go.php on line 1590

Seems the API call used failed and is not being handled.

How can this be fixed?