526 error for some of our visitors

Some of our visitors are experiencing the 526 error at the page https://hembry.se/se-pris/ but not on our other pages. Attaching the error message.

Only thing we have changed the last week is two DNS records that would allow the affiliate marketing tool Refersion to send emails to new affiliates. Here https://share.zight.com/X6unYg9m are those two DNS records. Here https://share.zight.com/2NuW2gqz is an image of our SSL.

I called GoDaddy and they told me there is nothing wrong there. They suspected the firewall.

Very thankful for any help!