I applied both solutions alongside reinstalling SWTOR, changing settings from high, medium, low, then turning back to my default which is medium settings. I also restarted my PC.
I know the problem is for my story because It is quite odd that I can play my other classes like all my light sides, however for Sith Warrior i guess i can't progress in the story mode anymore. Unfortunate i can't continue my story because convo goes black after its done. rip.
Thank you for the help. Guess i'm just going to have to play side quests forever now on my Sith Warrior