can you send me an email to dev[at]wp-pizza.com with your purchase receipt of the gateway please.
this issue does not exist anymore with the latest version.
omnikassa versions up to and including 1.3.1 did not automatically tell you that there are updates available as no licence keys were generated for it, so i will have to send you this update manually and will have to generate and send you a licence key for it.
thanks
(i suspect you have the yoast seo plugin – or something similar – installed in conjunction with which this issue existed until 1.3.1. that’s just as an explanation though)