Am I missing something? Sold stocks a few years ago; looking at market summary and said to be sold higher

Hi everyone.

On June 1st, 2021, I sold my AMC stock for a profit. I had 23 shares and sold at $29.33.

Today, I received a notification from cashapp saying that AMC is selling at $11. Curiously, I looked at the market summary and noticed that my stock was selling at about $400 each share on June 1st, 2021.

I recall that the market was selling at $29 when I sold, so I’m not sure where this $400 per share is coming from. Am I missing something?

Any help would be appreciated, thank you!