"Internal Exception: java.lang.IlegalArgumentException: Parameter 'directory' is not a directory"

When you connect to a server you will be immediately disconnected and get the following error:

"Internal Exception: java.lang.IlegalArgumentException: Parameter 'directory' is not a directory"

It appears to be an issue with Minecraft 1.8.6 and 1.8.7: https://bugs.mojang.com/browse/MC-81019

How to Fix

The workaround is to create the following folder manually: server-resource-packs

1. Start the Minecraft Launcher
2. Click 'Edit Profile'
3. Click 'Open Game Dir', this will open an Explorer (Finder on Mac) window in your '.minecraft' folder
4. Create a new folder called: server-resource-packs:

Windows

• Tap the 'Alt' key (To show the menu)
• Choose from the menu: File>New>Folder, this will create a new folder named 'New Folder'
• Change the name to: server-resource-packs

Mac

• Choose File > New Folder, or press Shift–Command (⌘)–N
• Enter 'server-resource-packs', then press Return