To reproduce:

1. Download attached project "New Unity Project.zip" and open in Unity
2. Open "SampleScene" scene
3. Build for iOS
4. Deploy the Xcode project to the iOS device

Expected results: App works as expected
Actual results: App crashes after Splash Screen

Notes:
- This issue does not appears on Windows and macOS Standalone (IL2CPP)
- This issue appears on WebGL, iOS, and Android (IL2CPP)
- For some reason from Unity 2018.3.0a7 app does not crash on iPhone 7 Plus and iPhone X
- Stacktrace is shared in Comments section
- Workaround: Select Window > TextMesh Pro > Import TMP Essential Resources and import everything

Tested with:
- iPhone 6 Plus, iOS: 12.0.1 - Repruduced
- iPhone 7 Plus, iOS 12.0 - Reproduced until Unity 2018.3.0a6
- iPhone X, iOS 12.1 - Reproduced until Unity 2018.3.0a6
- Samsung Galaxy S8 (SM-G950F), Android 8.0.0, CPU: Exynos 9 Octa 8895, GPU: Mali-G71 - Reproduced

Reproduced on Unity 2017.4.0f1, 2017.4.13f1, 2018.1.9f2, 2018.2.13f, 2018.3.1f1 and 2019.1.0a12