AWS lambda SSL error 525

Hi there, I have a Node.js application running on AWS Lambda, which has provided me with a default URL to access the application, let's say lambda.aws-region.com. I also have a domain (armure-de-soie.co) with its DNS records managed by Cloudflare. I created a subdomain, "api.armure-de-soie.co" and registered it with Cloudflare, setting its CNAME to point to the AWS Lambda URL. Additionally, I listed this subdomain as a custom domain under AWS API Gateway and used an origin certificate generated by Cloudflare. However, I'm encountering an SSL handshake failed error with code 525. Any assistance would be greatly appreciated. Thank you!