Installing theme

While I was trying to install the theme on my site I have got a html-txt on my site. How could I resolve that?

Could I install Dutch as language in the theme?

That looks like you do not have the necessary plugins activated

For language queries it’s best to ask the author

Which plugins do I need?

It looks like a theme builder plugin but the process etc. will be outlined in the theme documentation

Which themebuilder do I need for Newspaper Theme?

For theme specific questions you either need to read the documentation or else contact the author https://help.market.envato.com/hc/en-us/articles/203039054-How-to-contact-an-author