This is a problem of low resource allowance from your Host/Server, not a problem of Theme or WordPress. This is happening because the Maximum PHP Memory allowed by your host is too lower than the standard practice. Please ask your hosting company to set the Maximum PHP Memory to more than 256MB. You can also disable the Gallery Block from WP-Admin > Appearance > NewsPress Options > Gellery. Thus your PHP Memory demand will be reduced. You are also requested to optimize your site properly. You can use W3TodalCache Plugin and use CloudFlare.com Free Plan for better performance and reduce the pressure on your hosting/server.
You are requested to read This Articles
Article 01
Article 02
Article 03
Article 04
Article 05
Article 06
