Royalty Percentage of 0 returns error message in minting UI

[sk33z3r]

Repro:

1. Create NFT metadata with royalty_percentage set to 0
2. Upload files to IPFS and get metadata CID
3. Connect and unlock wallet at loopring.io
4. Go to My NFT > Mint NFT
5. Paste metadata's CID

Expected: After entering the quantity I am able to mint

Actual: The mint UI returns an error giving all the minimum requirements for metadata (including royalty between 0 - 10)

Notes:

• I received the following screenshot from a user asking for help. Looking at their metadata and how they uploaded files, everything was correct syntactically and images were loading properly. Luckily this person remembered some other post in Discord that mentioned this being an issue. When the user changed their royalty_percentage to 1 the minting UI allowed them to proceed and mint the NFT.
• The error at least tells you something, but it would be nice if the UI could return specifically the item that is not reading correctly. This would speed up troubleshooting tremendously.

[sk33z3r]

This has been resolved in the new "Advanced Mint" action in the UI.