I have this issue as well. Mines been broken for 2 months. The devs of the game need to redesign their launcher and make it more modern and robust. Basically reinstalling the game should fix the launcher issue if its broken which it is! Even if you reinstall basically when u download the game it should install a working launcher for you, not be some backend/backwater thing where u gotta go through firewalls/online settings/ all kinds of other weird backend fixes that don't even work it should just be developed into the game I strongly advise the professionals here that are able to diagnose this issue send this to the developers of the game to remake their launcher into a more modern/robust launchpad hell have them do It atleast by next expansion so more ppl will come back to the game and actually be able to load! ive seen countless supposed fixes for the launcher and workarounds all don't work.. ive been playing pc games for 18 years and never had an issue like this before!
Its serious for this game and needs to be drastically fixed, when its gets broken it seems like there is no fix but to reformat your entire computer and hope it doesn't break again. but like I said that's a problem with the game not with the computer itself as this is the only game with a launchpad that suffers from the issue I play planetside 2 that one uses a launchpad and loads just fine didn't have to play with firewalls or anything I just install the game BAM its been working fine for 5+ years straight no problems. but this game is a whole nother story altogether and it would be a star wars game as a long time ago they wouldn't be the best games out there, maybe mediocre at best due to bugs, etc.
Anyway basically professionals u gotta tell the developers of the game to remake their launchpad to be more like PlanetSide 2 check that game out its free to play on STEAM (VALVe Corporation) and after u install the game it loads a launchpad through steam and u can even download the game as a standalone through planetside 2 website https://www.planetside2.com/home
think about it professionals at EA! long story short this is the issue and it has a ton of supposed fixes and none of them work tldr:
tldr:
SWTOR launchpad doesn't load and no errors show up when it does not it just hangs in taskmanager if you go to look.
firewalls no go
launcher fix utility no go
deleting * in the folders no go
port forwarding no go
tldr
redesign the swtor launcher to be better. reinstalling the game should fix it. not it installs a broken game for you like what it does now! that's the problem.