How to reproduce:
1. Open the attached Test.zip project
2. Go to Menu bar-> Tiny-> Import Samples
3. Inspect the errors thrown in the Console window

Expected: Samples are imported
Actual: Errors are thrown

Reproducible with: 2018.3.14f1

Regression found in: 0.14.4 Tiny Mode package version

Error:
Tiny: Your mono install location (/Applications/2018.3/Unity 2018.3.0b10_6677d031dfe5/Unity.app/Contents/MonoBleedingEdge/bin) contains spaces, which will result in export errors.
You can fix this by removing the spaces in the path, or installing mono to a different location with no spaces and setting the path in the Tiny Preferences.
UnityEngine.Debug:LogError(Object)
Unity.Tiny.TinyPreferences:LogErrorMonoPathWhiteSpaces() (at Library/PackageCache/com.unity.tiny@0.14.5-preview/Editor/Windows/TinyPreferences.cs:342)
Unity.Tiny.TinyPreferences:get_MonoDirectory() (at Library/PackageCache/com.unity.tiny@0.14.5-preview/Editor/Windows/TinyPreferences.cs:321)
Unity.Tiny.TinyRuntimeInstaller:UpdateToolchain(Boolean) (at Library/PackageCache/com.unity.tiny@0.14.5-preview/Editor/Export/TinyRuntimeInstaller.cs:416)
Unity.Tiny.TinyRuntimeInstaller:Install(Boolean, Boolean) (at Library/PackageCache/com.unity.tiny@0.14.5-preview/Editor/Export/TinyRuntimeInstaller.cs:439)
Unity.Tiny.TinyRuntimeInstaller:LazyInstall() (at Library/PackageCache/com.unity.tiny@0.14.5-preview/Editor/Export/TinyRuntimeInstaller.cs:40)

Exception:
Failed to update dependencies:
TINY SHELL> /Users/vita/Downloads/New Unity Project (14)/Tiny/Dist
export PATH="/Applications/2018.3/Unity 2018.3.0b10_6677d031dfe5/Unity.app/Contents/MonoBleedingEdge/bin":$PATH
mono bee.exe
[E] DAG generator driver failed: mono --debug bee.exe build --beemode=ToCreateBuildGraph --root-artifacts-path=artifacts --bee-driver-buildprogramroot=.
[ 0s] Build frontend of artifacts/buildprogram/tundra_buildprogram.dag ran (no suitable previous build dag file)

Note: Could not reproduce on the earlier versions because of thrown errors