Cloud Connection problem Mysql

Hello everyone.
I bought cloud server on hetzner: 2vcpu 8gb ram.
I follow this tutorial: from this website https://devanswers.co/

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I copied mine real map server compile it on ubuntu and start. Everything looks good but

1. When I try connect to the game world its not succed. Waiting few minutes and connection failed. 

2. I noticed that everything is displaying on my page, however, when I enter someone's character it crashes "This page does not work HTTP ERROR 500". When I try to make a new account, I write that everything worked out, but the account itself is not added to the database and does not actually exist.

Please help me guys. I dont have any idea what to do. Before I tried to unlock some ports and download some updates to mysql and then I got wrong password in tibia connection but later errors began to pop up everywhere and I had to start all over again.

Ubuntu 16.04

Guys I added ports to ufs to unlock them but if I check them with https://www.ipfingerprints.com/portscan.php they are still blocked? Whats wrong?

It's still blocked if I sudo ufw disable ;/