If I change my skin, it says that it can't upload my skin, but I had this skin before the new launcer.

Put the summary of the bug you're having here
My skin changing back to my created skin.
What I expected to happen was...:
Describe what you thought should happen here
That it would change my skin
What actually happened was...:
Describe what happened here
I can't change it, it says that it can't upload it while I used this before the new laucher.
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...