How I Fixed Error 0x21002001 in Red Dead Online (READ DESCRIPTION & PINNED COMMENT!!)

I fixed the problem by going into my router settings and setting my PS4 as DMZ HOST. Call your internet service provider and ask them how to do this it’s different for different internet. And forwarded all suggested ports. Just look up RDR2 ports I can never finish a mission in red dead online. I cant even finish a most wanted or anything. When im in the middle of something, it gives me error 0x21002001 every time. The only thing i can do is free roam and that's pretty boring, so please help me out.