s3fs "Transport endpoint is not connected" error on ubuntu

So this error can probably be cause by many reasons:

s3fs "Transport endpoint is not connected" error

My issue was caused when I tried mounting my s3 bucket with the s3://mybucket in the name. Then I wasn't actually unmounting it until I ran

sudo fusermount -u /mnt/sshfs

Then when I reran the s3fs command it worked. 

s3fs mybucket /mnt/s3_upload/

use the "d" and "f" flags for the s3fs to give me debugging output.