Is Kraken ripping me off?

So yesterday I decided to move all my coins onto my Ledger because I still had quite an amount on my Kraken account, and while I had no problem withdrawing most of my coins, I had an issue withdrawing Cardano and Solana. I currently have around 319 ADA on my Kraken account, and when I select the maximum amount to withdraw, it says that I can only withdraw 15, and if I enter the maximum amount manually I get an error message. Same goes for Solana. What is going on? Am I being ripped off by Kraken? Any advice?