Did you try to switch the game hosting player ? From my experience this message appears, as long as the host isn't ready. If the host is ready (in loading screen) game is created and data should be uploaded for joining player, too.

Thanks for replying,

Yes we did change it but, then there was one who was starting the game and my friend got stuck on the (what i assume) world creating messages for over 15 min so we decided that this also didnt work.

I quote extracts from here:  https://www.games2gether.com/endless-legend/forum/13-tech-support/thread/5394-read-first-common-issues-guides-and-solutions

You AND (!!!) your friend should try to fix your problem, by executing the following points, one by one, until it (hopefully) succeeds:

General PC troubleshooting

Verifying the integrity of your game cache

• Load Steam

• From the Library section, control-click on the game and select Properties from the menu.

• Select the Local files tab and click the Verify integrity of game cache... button.

• Steam will verify the game's files - this process may take several minutes.

• Once the process is completed, the Check Window will automatically exit.

Update your drivers

While sometimes games can run fine even on outdated drivers, they are a common cause of issues in games, from graphic glitches to crashes. Update your graphic card's drivers by downloading and installing the newest drivers from the manufacturer's website. If you aren't sure how to find the appropriate drivers, we can help you find out which ones you need!

Windows 10 and our games

If you are encountering issues launching Endless Legend with Win10, right click the game icon, go to Properties and in the Compatibility tab, tick the box "Run this program as admin". In some cases your Documents folder might be read-only, if that is the case be sure to change that setting too!

Intel HD Graphics used instead of nVIDIA card 

• Go to NVIDIA Control Panel

• 3D Settings->Manage 3D Settings

• Tab "Global settings"

• Preferred Graphics Processor 

• Select: High performance NVIDIA processor

Run this program with Windows7 compatibility 

• Locate the EndlessLegend.exe executable. It should be located somewhere in $/Steam/SteamApps/Common/EndlessLegend

• Right click on the exe and select "Properties"

• Select the "Compatibility" tab

• Check the "Run this program in compatibility for " and select "Windows 7"

Re-install the library .Net Framework 4.5.1

• You can find the installation program here: /Steam/Steamapps/Common/Endless Legend/_CommonRedist/DotNet/4.5.1

• Launch a normal game in order to test.