Josh – I’m also needing help with this. I see a plugin that says it will fix this, however it removes imports from google cal and iPhone, only supporting Outlook.
I’m hoping to use all import methods.
Wanted to check in, before attempting to figure it out myself.
The plug in states something about the header ine export file being an issue?
https://github.com/afragen/the-events-calendar-outlook-import-fix/blob/develop/the-events-calendar-outlook-import-fix.php