Thanks for reaching out. If you are seeing an issue with a channel (app) provider's service, you'll want to reach out directly to report the issue and request their assistance with their channel, if other channels are working correctly. You can get in touch Newsmax support here for more help: https://www.newsmax.com/contact/customerservicecontact/
We do help pass along feedback from customers to channel providers. However, unfortunately we do not develop, manage, or maintain their channel, content or content delivery systems. A channel provider will need to address this type of issue directly in order to resolve a potential problem with their content. If their service feed is encountering issues across multiple sources, it's likely there is an issue that they'll need to take a look at.
As an alternate option to watch in the meantime, you can also access Newsmax inside 'The Roku Channel' as another source for this service. It is available under the 'News, Sports, and Entertainment' row inside the channel. https://channelstore.roku.com/details/151908/the-roku-channel
I'll be sure to share any further updates that I hear.