HTTP Error uploading images

Since I installed the theme I’ve had problems uploading images. .jpg, .png, anything. We’re talking 200kb size images. I get a constant “HTTP ERROR”.

My host is Hostgator. They spent over an hour, escalated it to their higher level techs, and finally came back to me with “it’s the theme”.

I’ve already deactivated all plugins, still the problem occurs. It DOES NOT occur on my other sites with different themes on the same hosting account, only Newspaper. I do NOT have jetpack plugin either.

I’m not sure what to do or how to fix it, can you please advise?

I do not know how to code or anything, that’s out of my league (which is why I use this theme and WP in the first place).

Also, are there other ways to upload images than through WP? I’ve tried putting them on the host through Filezilla, but they don’t show up in Media when I want to add them to a post.

Thanks in advance for your help.