This is the most common culprit. Sigpatches allow your Switch to bypass the signature check for installed NSPs.
The latest NSP update for Inazuma Eleven: Victory Road on Nintendo Switch focuses on stability, gameplay polish, and quality-of-life improvements. It addresses matchmaking, AI behavior, save reliability, and adds minor content tweaks to improve the post-launch experience. inazuma eleven victory road switch nsp update work
If an NSP update for Inazuma Eleven: Victory Road were to happen, here's what players could potentially expect: This is the most common culprit