Found a single missing block at 4 -62 -126

Hello, everyone.

I have created a version of the 404 challenge for Minecraft Bedrock edition, version 1.21.

Requirements:

1. Activate hardcore mode
2. Turn on recipe unlocking
3. Use Bedrock edition
4. Use version 1.21
5. Use the seed 404
6. The ability to earn achievements in the world
7. Follow the rules

NOT allowed:

1. Behavior packs of any kind
2. Mods of any kind
3. Cheats
4. Experiments
5. Anything else that prevents you from earning achievements in that world

Allowed:

1. Texture packs of any kind
2. Multiplayer mode
3. A coordinate counter
4. A counter for days played

Rules/steps:

1. Mine a single oak tree (only one oak tree per person).
2. Craft a crafting table out of the wood.
3. Throw away any saplings.
4. After completing steps one through three (1 through 3), you may only use bamboo and no other wood type.
5. You may only leave the bamboo forest when going underground.

Enjoy!