StartInstance[ap-northeast-1]

It appears you're encountering a permission error (403 Forbidden) when trying to start an instance in the Asia Pacific (Tokyo) region (ap-northeast-1). This is a common issue, especially with new AWS accounts or when using the free tier.

Here are some steps to resolve this issue:

1. Check your IAM permissions: Even if you're using the root account, you might need specific permissions to start instances.

2. Try signing in as the root user: If you're currently using an IAM user, the root user might have more permissions. However, using the root account for daily operations is not recommended for security reasons.

3. Contact AWS Support: For account-related issues like this, you can contact AWS Support by opening a case under "Account and billing" category. This type of support is available free of charge, even on the free tier.

The error message specifically suggests contacting Customer Support, which indicates this might be related to account limitations or verification issues rather than just a simple permission problem.
Sources
unable to create new instane in light sail | AWS re:Post
Lightsall facing start instance | AWS re:Post