I'm extremely new to SharePoint and most definitely not our company's SharePoint dev. They set me up with a WebPart and its project where I can write some code.
The page was working perfectly fine when in a Sandbox. I needed to unsandbox it, so I can send out emails, and only flipping the "Sandbox" bit and changing literally nothing else, following a deploy I now get a
Web Part Error: The request could not be completed because the specified solution was not found.
When reverting back to a Sandbox it starts working again. Any chance this is a simple fix ?