Error trying to setup Amazon S3 bucket

I’m trying to configure CBB on Ubuntu Linux (Amazon Lightsail instance) to use S3 as stoarge, but cannot select a bucket, I get an error:

SSL: couldn’t create a context: error:140A90F1:lib(20):func(169):reason(241)

after I enter my key/credentials.

What is this error and how do I fix it??

solved - sort of, it seems to be an issue with another application trying to use the package - reinstalling fixed the issue