Trouble while buying subscription on skillbuilder.aws

It appears you're experiencing an issue while trying to purchase a subscription on AWS Skill Builder. This is a known problem that some users have encountered. Here are a few things you can try to resolve the issue:

1. Make sure you're using the correct login credentials. AWS Skill Builder uses your Amazon.com account credentials, not your AWS Console login. Double-check that you're using your Amazon.com username and password.

2. Clear your browser cookies and cache, then try accessing AWS Skill Builder again.

3. If you're still encountering issues, it's possible there may be a temporary technical problem on AWS's end. Some users have reported that AWS Skill Builder was not accepting new account creations or subscriptions for a period of time due to technical issues.

4. If the problem persists, it's recommended to contact AWS support directly about this issue. They can provide more specific assistance and information about any ongoing technical problems.

Remember, even if you see an error message but can access the menu on the left side of the page, try ignoring the error and navigate through the menu. Some users have found this to be a successful workaround.

If you continue to face difficulties, reaching out to AWS support would be the best course of action for a resolution to your specific situation.
Sources
Amazon Login not working for AWS Skill Builder | AWS re:Post
Can't logon to Skill Builder... | AWS re:Post

Can you try again using another browser and using this link ?
https://skillbuilder.aws/subscriptions

If it still not working, I recommend you to contact the AWS Support
AWS Support