The second problem http://www.oxwall.org/ow_userfiles/plugins/base/7273-admin%20dashboard.jpg has been already reported it will be fixed asap.
As to the cron task - here's the tutorial how to configure your cron jobs: https://docs.oxwall.org/install:cron Take a look at the Run cron locally part to configure your cron jobs via SSH or you can just contact your hosting provider to assist you with that.
Because by default, if you have https website and you put http in the URL you should be redirected to https
If you have http website and you put https in the URL, your website should just come without styles.
A convenient way to set cron job, please go: https://www.easycron.com and check to this tutorial at
https:///...-cron-job-for-oxwall