The plugin does not have a valid header.
By Dhyana E. Kearly, 5 years ago. Last reply by Andrew Misplon, 5 years ago
This conversation: https://siteorigin.com/thread/plugin-cant-be-activate/ I’m having exactly this same problem. I’ve uninstalled via FTP and reinstall, but keep getting the message: The plugin does not have a valid header. Can you help?