API Request Failed when transfer domain

Website, Application, Performance Registrar
1

When I transfer domain to Cloudflare, I received this.

API Request Failed: POST /api/v4/zones/7330a0e3e2ed37e4fc59e3dcc0b764b3/registrar/domains/hkcolond.com/transfer (500)

What should I do?

2

A post was merged into an existing topic: Got api request fail 500 when transfer domain in