Game closes upon attempt to create new/resume old worlds

With DST closed, please verify your game files via steam. If that does not solve the issue then please follow the steps in the following help article. I'd suggest starting at #3
https://support.klei.com/hc/en-us/articles/360029882171-Getting-a-Unable-to-write-to-files-in-the-config-directory-Error-Message

If neither of those help, then please post your Master and Caves server log files.
You can quickly jump to them by clicking the Manage World button on the host game list screen then Open World Folder.

If you are still not getting any server log files, then after attempting to host a world, please close DST and then see if these files exit and attach them to this report:
\Klei\DoNotStarveTogether\client_log.txt
\Klei\DoNotStarveTogether\master_server_log.txt
\Klei\DoNotStarveTogether\caves_server_log.txt

23 hours ago, ScottHansen said:

With DST closed, please verify your game files via steam. If that does not solve the issue then please follow the steps in the following help article. I'd suggest starting at #3
https://support.klei.com/hc/en-us/articles/360029882171-Getting-a-Unable-to-write-to-files-in-the-config-directory-Error-Message

Problem was solved after adding dontstarve_steam_x64.exe and dontstarve_dedicated_server_nullrenderer_x64.exe to white list of windows security. Also this problem was solved even for modded servers. Thank you!