[0.6.8] Library import errors

Hi, I'm getting errors importing the Addressables package after upgrading to 2019.2.0a9 from 2018.3 (I've tried upgrading to 2019.1 before with similar issues) Trying out previous versions of addressables result in more errors.

Code (CSharp):

1. Library\PackageCache\com.unity.addressables@0.6.8-preview\Runtime\ResourceManager\ResourceProviders\AssetBundleProvider.cs(16,46): error CS0535: 'AssetBundleRequestOptions' does not implement interface member 'ILocationSizeData.ComputeSize(IResourceLocation)'
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6. Library\PackageCache\com.unity.addressables@0.6.8-preview\Runtime\ResourceManager\ResourceProviders\CachedProvider.cs(283,45): error CS0539: 'CachedProvider.CacheEntry<TObject>.Retain()' in explicit interface declaration is not a member of interface
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My manifest.json looks like this (It's basically default setup + Entities and Addressables)

Code (CSharp):

1. {
2.   "dependencies": {
3.     "com.unity.addressables": "0.6.8-preview",
4.     "com.unity.ads": "2.0.8",
5.     "com.unity.analytics": "3.2.2",
6.     "com.unity.collab-proxy": "1.2.16",
7.     "com.unity.entities": "0.0.12-preview.29",
8.     "com.unity.package-manager-ui": "2.2.0",
9.     "com.unity.purchasing": "2.0.6",
10.     "com.unity.textmeshpro": "1.3.0",
11.     "com.unity.timeline": "1.0.0",
12.     "com.unity.modules.ai": "1.0.0",
13.     "com.unity.modules.androidjni": "1.0.0",
14.     "com.unity.modules.animation": "1.0.0",
15.     "com.unity.modules.assetbundle": "1.0.0",
16.     "com.unity.modules.audio": "1.0.0",
17.     "com.unity.modules.cloth": "1.0.0",
18.     "com.unity.modules.director": "1.0.0",
19.     "com.unity.modules.imageconversion": "1.0.0",
20.     "com.unity.modules.imgui": "1.0.0",
21.     "com.unity.modules.jsonserialize": "1.0.0",
22.     "com.unity.modules.particlesystem": "1.0.0",
23.     "com.unity.modules.physics": "1.0.0",
24.     "com.unity.modules.physics2d": "1.0.0",
25.     "com.unity.modules.screencapture": "1.0.0",
26.     "com.unity.modules.terrain": "1.0.0",
27.     "com.unity.modules.terrainphysics": "1.0.0",
28.     "com.unity.modules.tilemap": "1.0.0",
29.     "com.unity.modules.ui": "1.0.0",
30.     "com.unity.modules.uielements": "1.0.0",
31.     "com.unity.modules.umbra": "1.0.0",
32.     "com.unity.modules.unityanalytics": "1.0.0",
33.     "com.unity.modules.unitywebrequest": "1.0.0",
34.     "com.unity.modules.unitywebrequestassetbundle": "1.0.0",
35.     "com.unity.modules.unitywebrequestaudio": "1.0.0",
36.     "com.unity.modules.unitywebrequesttexture": "1.0.0",
37.     "com.unity.modules.unitywebrequestwww": "1.0.0",
38.     "com.unity.modules.vehicles": "1.0.0",
39.     "com.unity.modules.video": "1.0.0",
40.     "com.unity.modules.vr": "1.0.0",
41.     "com.unity.modules.wind": "1.0.0",
42.     "com.unity.modules.xr": "1.0.0"
43.   },
44.   "testables": [
45.     "com.unity.test-framework.performance"
46.   ]
47. }
48.