[Resolved] Can’t upload a file in theme folder

Hi thanks for posting. FTP file permissions aren’t under the control of the theme, that would be a hosting level issue.

Please, don’t edit theme files directly. All WordPress themes overwrite all of their files when they update so you will lose any changes you’ve made the next time we release an update and you run the update.

Here is how the Meta Slider integration works: https://purothemes.com/documentation/ultra-theme/meta-slider/. At the bottom of that page you’ll find an alternative option using a SiteOrigin widget.