@gekidasa You have to configure values as like below:

• S3_ENDPOINT_URL: https://us-east-1.amazonaws.com
• S3_URL_BASE: https://gekidasa.s3.us-east-1.amazonaws.com

Please make sure that both values start with https://!

@hollo changed it to match, the error has changed. I even created a new access key, in case that was the problem (I checked the access key by connecting with an FTP client, it works and I can see the bucket )