I continue to get the error below. I have explored other topics and my buckets are set to US East (Ohio).
S3::getBucket(): [InvalidRequest] The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256. - /home/interaj7/public_html/wp-content/plugins/wplms-s3/includes/class.s3.php:445 Code: 0
Please change your bucket region .Please pick the bucket region which support version 2 signature coz wplms s3 uses version2 for signature .
refer this link to find proper region :
http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region