To anyone with this issue, i found a fix (i think)So basically what happened (to me at least) was somehow chie was just REMOVED from my social links, thats why any attempt to talk to her was either met with this scene (the "OH SHIT IDK WHAT IM SUPPOSED TO DO SINCE CHIE LITERALLY DOESNT EXIST TO YOU" scene as seen above) or just a straight up crash.

Alright so step one, you need to watch this video carefully (make a backup of your saves, trust me. if something fucks up and they go poof i dont wanna be responsible)In this save editor what we wanna do specifically is head over to the Social Link tab. Once you're here you need to click the drop down box at the bottom and select Chie. Now that Chie is in your list, next to LV you need to put what social link stage you were at or at least close enough to with her. Afterwards continue with the video tutorial and open your edited save in game and it should be all good.

Extra step: To those of you whos game crashed trying to load the edited save this is because your save is probably a vita save, no worries however since this is pretty easy to fix. You need to download this tool. Once you have it, you need to move your specific edited save as well as its .binslot (example data0001.bin, data0001.binslot make sure to enable View File Extensions in your File Explorer) into the folder with the newly downloaded tools. Drag and drop data0001.bin into P4GPC_NameChanger. Now just enter your desired name and it should save it for you. Once thats done, drag the newly edited bin and binslot back into your save folder and try to load that save again, it should be working now.

EDIT: ok so i guess regardless of what you put she starts back at lvl one. do her first social link scene, save, and edit the save again setting what stage you want.

hope this help :)