Subject: Unexpected Runtime Error when downloading basket (Cannot find central directory)

Description: I am experiencing a critical error when attempting to download my basket on ItemExchange. The process fails consistently when the basket contains a mix of both Items and Sets.

Error Message:

Unexpected Runtime Error Something went wrong: Cannot find central directory

Steps to Reproduce:

1. Add several individual Items to the basket.
2. Add one or more Sets to the basket.
3. Navigate to the basket/download page.
4. The error appears instead of the ZIP file generation.

Environment:

• Site: item.mania.exchange
• User ID: 16145 (as seen in the URL)
• Date: May 13, 2026

I got rid of individual items that aren't in sets, and it worked.