Error Decrypting Information

launcher
ftblauncher

#1

Greetings,
Launcher is not loading credentials. Following error can be seen in log

Loading user data

Password is now encrypted with new key

Converted password will be saved to disk after successful login

Error Decrypting information, attempting legacy decryption: javax.crypto.BadPaddingException: Given final block not properly padded. Such issues can arise if a bad key is used during decryption.

Failed to decode logindata: java.lang.NumberFormatException: For input string: "BvM"

No users found after decoding old logindata format.

Malformed logindata or empty logindata

Full log:
https://paste.feed-the-beast.com/view/4d8ac21a