Minecraft Windows 10 Edition crashes when you try to add your own behavior or resource pack to your realm

When you try to add a behavior pack or resource pack that you made yourself and try to save changes after doing so, it crashes the game.

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Steps to re-create this on Windows 10 Edition
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Step 1: Open Minecraft Windows 10 Edition

Step 2: Click Play>Edit Realm GUI>Resource/Behavior Packs> Select the pack that you made>Click Activate>Then save changes. It should now start switching between Initializing Upload and something else that shows an XP bar. Then it will sit on Initializing Upload and just crash the game 1 minute after sitting at Initializing upload.