I did a little research on the internet and there is already a post on the scs forum where several people are complaining about no sounds after 1.43.3.40s update. I think it might be a bug due to some driver incompatibility or scs bug and you should wait for the update, but maybe i'm wrong.
The post: https://forum.scssoft.com/viewtopic.php?t=309041&start=10
There is information on the possible solution to the problem on the second page of this post, so feel free to try it out.
In addition, you can check in the game log that you do not have the following lines:
Regards,
Player Not Found