When I import the Bolt package into a project that has no packages/modules imported I get an error because Bolt needs UGUI.
Also, the following exception is thrown which references a local path on @rohit.moni’s computer
{code:java}
NullReferenceException: Object reference not set to an instance of an object
Ludiq.PluginManifest.get_savedVersion () (at C:/Users/RohitMoni/Documents/Repos/bolt/Package/Ludiq.Core/Editor/Plugins/PluginManifest.cs:39)
Ludiq.PluginManifest.get_versionMismatch () (at C:/Users/RohitMoni/Documents/Repos/bolt/Package/Ludiq.Core/Editor/Plugins/PluginManifest.cs:48)
Ludiq.PluginContainer.Initialize () (at C:/Users/RohitMoni/Documents/Repos/bolt/Package/Ludiq.Core/Editor/Plugins/PluginContainer.cs:196)
Ludiq.PluginContainer..cctor () (at C:/Users/RohitMoni/Documents/Repos/bolt/Package/Ludiq.Core/Editor/Plugins/PluginContainer.cs:17)
Rethrow as TypeInitializationException: The type initializer for 'Ludiq.PluginContainer' threw an exception.
Ludiq.EditorApplicationUtility.OnHierarchyChange () (at C:/Users/RohitMoni/Documents/Repos/bolt/Package/Ludiq.Core/Editor/Utilities/EditorApplicationUtility.cs:152)
UnityEditor.EditorApplication.Internal_CallHierarchyHasChanged () (at /Users/builduser/buildslave/unity/build/Editor/Mono/EditorApplication.cs:340)
{code}

I know many users have the default set of packages installed in their projects, but many (like me) will keep it trimmed to the bare minimum and thus might not have UGUI installed. And next in the chain, UGUI has a dependency on IMGUI which has not been specified in package.json, but it looks like that has been fixed in 2020.1.2f1 (I’m on 2019.3).