Vendor creation is now fully fixed
Our last release fixed new vendor creation failing when the logo field was left blank. It turned out a second field — website — had the exact same problem, so creating a vendor could still fail depending on what was left blank.
Both are fixed now. Creating a new vendor works whether or not you fill in a logo, a website, or neither.
We're sorry this took two releases to fully resolve — thank you for reporting it again when the first fix didn't cover everything.