1. Use Chrome instead of IE. If Chrome does not work, please try Firefox. 2. Another possible solution can be found in this Qlik Community post: https://community.qlikview.com/thread/242608 3. Ultimately, it will be necessary to find out why Internet Explorer in the specific environment is not including the origin header. This is likely due to environment specific security policies. It has been found that at least one setting that prevents the Origin header from being added is the "Access data sources across domains" = Enabled. As a workaround Disable this setting.
If this resolved your issue, please mark this post as "Solution."