Custom skins not loading!!

I’m experiencing a critical issue with Minecraft Bedrock regarding custom skins. Despite using PNG files that strictly adhere to the accepted resolution standards (64x64, 64x63, or 128x128), the game fails to recognize any of my skins as valid.

Seemed to have happened after relogging into my Microsoft account, joined a multiplayer world filled with mods, exited the game for the whole night, resulting to this, but still unsure, this is the first time a problem like this has happened.