react-native-app-tour: Cannot do pod install or pod repo update

This is working great for me on Android now.

However on iOS I am having problems.

I have linked it already.

I then try to go to cd …/node_modules/react-native-app-tour/ios then I try pod install and that fails with:

Noitidarts-Mac-mini:ios noitidart$ pod install
Analyzing dependencies
[!] Unable to satisfy the following requirements:

- `MaterialShowcase (= 0.5.1)` required by `Podfile`

None of your spec sources contain a spec satisfying the dependency: `MaterialShowcase (= 0.5.1)`.

You have either:
 * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
 * mistyped the name or version.
 * not added the source repo that hosts the Podspec to your Podfile.

Note: as of CocoaPods 1.0, `pod repo update` does not happen on `pod install` by default.

[!] Automatically assigning platform ios with version 8.0 on target RNAppTour because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.

So then, per the readme, I try pod repo update first:

But then that fails with:

Noitidarts-Mac-mini:ios noitidart$ pod install --repo-update
Updating local specs repositories
[!] Failed to connect to GitHub to update the CocoaPods/Specs specs repo - Please check if you are offline, or that GitHub is down

This is real weird because I am online, and github is up.

Any ideas please?