The animation assetbundle in the project is missing a dependent assetbundle that has serialized file CAB-152c02fff156463da8c5150602bca1c5 and which is not part of the provided project. That animation AssetBundle is not built based on the provided project and not listed in the StreamingAssets.manifest file so the name of the missing AssetBundle is unknown, but hopefully can be determined with a more complete project. The Assert is only in developer player builds by design, but we will look for opportunities to put more clear error messages that are not so low level.