Skins appear invisible/transparent after updating to version 1.26.50

Description:

After updating Minecraft to version 1.26.50, my character skin is completely transparent/invisible in the Dressing Room and gameplay.

Steps to Reproduce:

1. Update Minecraft to version 1.26.50.

1. Open the Dressing Room from the main menu.

1. Observe that the character skin fails to render and appears transparent.

Observed Results:

The skin is transparent, and the character model is missing its textures.

Expected Results:

The character skin should load and display correctly with all textures visible.