Usually the problem is your CPU being 10th gen or higher. To change this:
In the Windows Start menu on the bottom left search for "Edit the system environment variables" and open the program. https://steamuserimages-a.akamaihd.net/ugc/2502405024885740780/64631A97AEFDC2F612E5AEC64D31B2F224D6B118/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false
In the "advanced" tab click on "Environment Variables..." near the bottom.https://steamuserimages-a.akamaihd.net/ugc/2502405024885748221/59247156AA09060A30FC6072EEF7B4A87A3C8E98/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false
In System Variables (not user variables) click "New..." and add a new system variable where the variable name is OPENSSL_ia32cap and the value is 0x200000200000000. Make sure to click OK to apply the changes.https://steamuserimages-a.akamaihd.net/ugc/2502405024885746183/32F7883B0ECCA7CCBDCCB53D2B876710A0EC20E8/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false
Finally restart your device and you should be good to go.
https://steamuserimages-a.akamaihd.net/ugc/2502405024885746373/F1BDAA78E3020887272E32A5584F4FE88DB7AF88/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false
If you're on Linux, you can set the appropriate environment variable via env OPENSSL_ia32cap=0x20000000 %command%.

If you wonder how to check the CPU generation is the number after the i#, examples: i5 9300H (in this case the 9 means is 9th gen), i3-10100 (here the 10 means is 10th gen), i7 processor 14700K (the 14 means is 14th gen).
https://steamuserimages-a.akamaihd.net/ugc/2502405024885739441/494577447B3CD7ED17F15A16DF3EF169A3A134F8/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false
https://steamuserimages-a.akamaihd.net/ugc/2502405024885737265/E29C2049C54230D5A6E4118699793F368A072BCB/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false

https://northstar.tf/ allows you to join dedicated servers and use mods with ease. I recommend VTOL but you can have a look at the different installers here https://docs.northstar.tf/Wiki/installing-northstar/northstar-installers/
If you also want to mod (with a bucnh of other games to!) check out https://thunderstore.io/