To reproduce:
1. Open Unity launcher
2. Press Learn tab
3. Select Tutorial Projects
4. Locate 2D Game Kit (should be second from the top) and press download
5. After the project is downloaded press Start

Expected result: the project is loaded without issues
Actual result: getting a Error pop up

Reproduced on:
2018.3.0a10 2018.3.12f1

Not reproduced on:
2017.4.25f1 2018.3.0a9 2019.1.0b10 2019.2.0a10

Notes:
- On 2019.1.0b10, 2019.2.0a10 getting a lot of packages errors.
- On 2017.4.0f1 - 2018.3.12f1 getting scripting errors.
- Opening a "Start.unity" scene on 2017.4.25f1 crashes Unity
- Didn't reproduce on Win10 machine, getting no console errors also