Couldn't Unpack Natives. "Source does not exist"

[18:46:46 ERROR]: Couldn't unpack natives!
java.io.FileNotFoundException: Source 'C:\Users\Tan Jun Hao\AppData\Roaming\.minecraft\assets\objects\17\17491c8dd9511e9d848c92b4b7ae047aed164072' does not exist
at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:1074) ~[launcher.jar:1.6.61]
at net.minecraft.launcher.game.MinecraftGameRunner.reconstructAssets(MinecraftGameRunner.java:272) ~[launcher.jar:1.6.61]
at net.minecraft.launcher.game.MinecraftGameRunner.launchGame(MinecraftGameRunner.java:119) [launcher.jar:1.6.61]
at com.mojang.launcher.game.runner.AbstractGameRunner.onDownloadJobFinished(AbstractGameRunner.java:186) [launcher.jar:1.6.61]
at com.mojang.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:122) [launcher.jar:1.6.61]
at com.mojang.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:1.6.61]
at com.mojang.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:86) [launcher.jar:1.6.61]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_101]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_101]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_101]