Cannot add Slack bot

I cannot find Alpaca Slack app in the app directory (https://www.slack.com/apps) and the link on the website Alpaca for Slack - Documentation | Alpaca is missing. Moreover, when using the pre-installed app in community channel I keep getting an error: /alpaca failed with the error "ssl_cacert" when trying to interact with the bot. Has anyone had similar problems and knows of a solution? Thanks!