There have been alot of questions about the “plus” plugin, but the actual theme from the wordpress theme browser failed at install:
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Broken Themes
The following themes are installed but incomplete. Themes must have a stylesheet and a template.
Name Description
influence Stylesheet is missing.
Hi Jake
Sounds like you’re up to speed but just to confirm, all SiteOrigin Plus theme upgrades are plugins and need to be installed from Plugins > Add New: Upload Plugin.
For the problem you’re seeing. Try heading to Appearance > Themes and deleting Influence. Then head to Appearance > Themes > Add New, search for Influence and re-install it.