To reproduce:
1. Open users attached project "Project.zip"
2. Observe the UNetWeaver errors, clear the console
3. Open Packages folder in the projects folder
4. Open manifest.json file and delete "com.unity.entities", "com.unity.jobs" , save the file
5. Go back to Unity observe UNetWeaver errors
6. Add the deleted lines back to manifest.json file and save it

Expected result: no errors are thrown
Actual result: getting more UNetWeaver errors

Reproduced on:
2018.1.0f1 2018.1.3f1 2018.2.0b8

Not reproduced on:
2017.4.5f1 2018.1.0b1 2018.3.0a1

Notes:
Only reproduces on Windows, does not reproduce on iMac MacOS 10.13.4
On 2018.1.0b13 and earlier version getting Packages errors in the console, but not UNetWeaver