Can't sell players for shards

Hi there. Even if you have reset your Gauntlet matches and claimed your stars, the game still saves multiple squads behind the scenes for each level. To fully clear your items so you can exchange them for Star Shards, please try these quick steps:

• Go to Gauntlet Mode and open your lineup screen.
• Tap the OVR number in the top-left corner of the screen.
• This opens a list of all squads you have used across different levels.
• Check every squad and reserve on that list, and remove Gvardiol from all of them.

Once those are fully cleared from all those squads, you will be able to exchange it immediately. Let me know if this works for you!