PenciDesign replied
Hi,
Please use Visual Composer to build it - we don't support another page builder with this.
If you don't have Visual Composer, you can go to download page, re-download "All files and documentation" from this theme, after that extract it and find visual_composer.zip file from Plugins folder.
And, please make sure you're using latest version of Soledad theme ( version 4.0.3 )
If not, please update this theme to latest version, check this guide to know how to update this theme to latest version.
Best Regards,
PenciDesign