Wojciech Nycz

@CubeTheThird, thank you for your help. After reading your comments I've started performing various tests, including changing default version of java for my system with the command bellow. I had 2 versions installed:

~$ sudo update-alternatives --config java

There are 2 choices for the alternative java (providing /usr/bin/java).  Selection    Path                                            Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-11-openjdk-amd64/bin/java      1101      auto mode
  1            /usr/lib/jvm/java-11-openjdk-amd64/bin/java      1101      manual mode
  2            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      manual mode

 Choosing version 8 didn't solve the issue but... I've noticed that there was an update for "ca-certificates-java" among many others. After installing the update and returning to default version (which is java-11-openjdk-amd64) the issue has resolved itself and I can connect to server as usual. I'm providing the version information of the update fixing the issue below. Please mark this bug appropriately.

Thanks again and have a nice day! 🙂

Wojtek

ca-certificates-java (20180516ubuntu1~18.04.1) bionic; urgency=medium

This is a fresh install of Linux Mint (Ubuntu derivative). openJDK 10 is default/current version for this distro.

Are there any operations you'd like me to perform in order to better diagnose the problem? (other than regressing java version)

I've added a screen capture, so you can see the whole process.

Yes. Right after trying to join the server.

I'm also gonna mention, in case this has something in common, that i have issues with logging in after restarting the launcher. It doesn't always remember my login and sometimes i need to enter the password more than once or restart the launcher all together.

Those ARE logs after this error. I've specifically deleted all logs prior to generating those two.

No i did not.

I can only play single player mode but my skin is set to default slim skin as if the game couldn't load my skin.
When I try to connect to server the message is shown like in the screenshot.

Heh, like if I'd seen an iPhone... if a feature doesn't work just right, disable it all together. Fixing stuff cost money. Disabling is free! YAY!

For people who google for how to get their horse out and end up here, here's a short video of one of many ways how to get your horse out of the boat without killing it before the bug us fixed:
https://www.youtube.com/watch?v=aFqo3Kk7YvE

Cheers,
InnerBushman

Confirmed in 15w44b

Confirmed for 15w44b.