Connection to storage server failed

I am testing the latest version and I am having problem with email and roundcube
I cannot connect with webmail and I get error message “Connection to storage server failed.”

Could you share also your os, version and used installation string?

Debian 9 and Ubuntu 18.04, 16.04 and I have tested on Scaleway, Hetzner cloud servers
bash --multiphp yes

Could you send a email with your server credentials to [email protected]? Until now, we do not know about such an issue.

Havent got any reply from you yet, but we did got another issue report about the same reason:

The issue has been solved, please check out the following issue report on git:

Yes, problem solved
Thank you