Guest/ Anonymous user can not post a question

I get the same behavior: https://db.tt/KrQlcROs
Even though i set Anonymous permissions to Read and Post

Thanks!

Also when they answer, the answers don’t show up. Wonder if it has to do with the Cron Job?

The same problem here. It’d be great to get this fixed before I start using the plugin. Looks great and very useful!

What is solution for this error

Warning: mysqli_real_connect(): Headers and client library minor version mismatch. Headers:50621 Library:50542 in /home/amir/public_html/wp-includes/wp-db.php on line 1386
???