403 error when opening the checkout page
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After updating the api-keys in the settings panel, we started getting errors when trying to go through the checkout process.
When entering the checkout page all we get is: “En feil har oppstått – vennligst last inn siden omigjen for å restarte transaksjonen, eller gå tilbake til butikken.”
We have double checked the api-keys on the settings page, and they are correct.
In the logs we see many lines like this:
2026-08-13T08:09:35+00:00 Debug Initiating Checkout session for *
2026-08-13T08:09:35+00:00 Feil Kunne ikke starte Vipps MobilePay Checkout-økten: MSN * 403 Forbidden ForbiddenChecking the network tab when opening the checkout page we see an ajax request that looks like:
_vippsorder: *
vipps_checkout_sec: *
_wp_http_referer: /vipps_checkout/
action: vipps_checkout_start_session
orderid: *{
"success": true,
"data": {
"ok": 0,
"msg": "MSN * 403 Forbidden Forbidden",
"src": "",
"redirect": "",
"orderid": *
}
}
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Since it’s a new MSN, it seems to be related to the recent sale of Vipps MobilePay Checkout to Kustom. Because of this, Vipps MobilePay Checkout users will migrate to Kustom Checkout within april 2027, but if I’m not mistaken new MSN’s cannot acquire Checkout anymore – you will have to instead install and use Kustom Checkout which will provide Vipps MobilePay as a built-in payment option.
Alternatively you can still use the WooCommerce standard checkout and Vipps MobilePay will work there as a standard payment method.
You can read more about the Vipps MobilePay Checkout and Kustom changes here. We recommend contacting Vipps MobilePay support directly for further information or clarification about these changes for new MSN’s.
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