The reason you are getting this error is because you do not have a bitcoin wallet installed on your computer or mobile device. If you do not have a bitcoin wallet installed, your device/computer will not know how to handle the bitcoin: URI.
To complete the payment, you can scan using your wallet or copy and paste the payment details into your web wallet. View our guide to these other ways of paying an invoice.
For assistance with choosing a wallet to install on your device, please visit the following link: What Wallet Should I Use?
If you're a Blockchain.info wallet user, Blockchain.info released an article on how to set Blockchain's custom URI handler to openall bitcoin: links in the Blockchain.info wallet. You can find more information here: How To Set Up Blockchain's URI Handler In Your Browser