I solved this problem today

How to fix team validation failed error in Axie Infinity - YouTube

TEAM VALIDATION FAILED AXIE INFINITY

I solved this problem today by doing the following two actions (not sure which one fixed the issue): list & then cancel the axie on marketplace rename (I suggest to default ID name)

In this quick Axie Infinity

Axie Infinity Team Validation Failed Error & Axies not

In this quick Axie Infinity tutorial video, I show you how to fix the team validation failed and errors caused when axies are swapped between accounts

Validation Failed - Sky Mavis

Error When Creating Team

'Error : Validation failed' while creating new team.

Axie Infinity

Error When Creating Team: Validation Failed. This error occurs for one of two reasons listed below: An axie on the team has been sold or gifted and you no longer own it. If you did not authorize the gifting of this axie, please see Unauthorized Transfer of Assets. Your email has not been validated. Please login to the marketplace and verify

SOLUCIÓN: TEAM VALIDATION FAILED en AXIE

Team validation failed? : r/AxieInfinity - Reddit