Getting "not a module" error in 5.4.0-beta.2

[cbadger-montecitobank]

Hello. I'm trying to use the 5.4.0-beta.2 beta version of the react-step-wizard component, which seems to work, but I'm getting a typescript compiler error stating that the index.d.ts file is not a module:

Any suggestions? Again, when my application runs it seems to be working, but the typescript error is stopping my build process.

I'd stick with the 5.3.11 version, but the latest React complains about it's use of defaultProps.

Thank you!