Greetings Carcoona!
Thank you for your report and welcome to our forums!

Can you please share with us a screenshot of the error message regarding the Fatal Error and send us your log file please?

You can find the log here:

Steam\steamapps\common\Conan Exiles\ConanSandbox\Saved\Logs

Feel free to reach out in private via direct message if you prefer.

Thank you in advance.