element.type.toLowerCase is not a function about react-component-caching

[kvnam]

@yasin749 - Did you ever solve this? I'm trying to implement this in my app and am facing the same error, except in my case the first element has type
type: { '$$typeof': Symbol(react.provider), _context: { '$$typeof': Symbol(react.context), _calculateChangedBits: null, _currentValue: undefined, _currentValue2: undefined, _threadCount: 0, Provider: [Circular], Consumer: [Object], _currentRenderer: null, _currentRenderer2: null } },

Naturally toLowerCase is not a function on this... I'm using React and react-dom version "16.12.0". Any confirmation would be appreciated thanks!

[chris-hinds]

Doesn't look like this package is maintained anymore?

[Pranab16]

I am also seeing the same error.