every time I click play on this world it acts as if its loading and then it closes tekkit legends and go directly back to the launcher. pls send help
crash-2019-08-15_13.34.41-server.txt crash-2019-08-15_13.34.52-client.txt

I'm new to Technic, and I'm trying to join a server with a modpack that runs on 1.12.2, but when I open the modpack through the Technic launcher it says that I need Forge to open some of the mods.
I downloaded Forge for 1.12.2, but you have to open it through the Minecraft launcher. Which means I can't use the modpack through Forge or Technic.
I've tried looking through launcher settings to see if I could tell Technic to open the modpack with the Forge version that I downloaded. Doesn't work. Other people seem to get on the server fine. Is this a problem with me, or the modpack?
Edit: I've attached a photo showing the messages I get when I try to use both launchers. The photo was too large to attach, so I decided to use the URL, but it's on TinyPic, so if you don't see it, it's probably because they're shutting down.
http://tinypic.com/r/2vdp9br/9

Okay, so I have reinstalled technic a few days ago because I wanted to play a dragon ball mod I saw. I played dragon block c resurrection (only listing names because I feel like it may be important) and a few others mods and I got attached to a server mod, and it worked for a bit, but now, it is the only mod that works. I tried resurrection again and when I press play it will just hide the launcher for a bit and then re-open it. I have downloaded the 64-bit java recently so that may be the result, but currently no mods work besides the server mod (dragon block zero S if it really is important.) Im new to technic and forums over all, so im not sure how to attack files fully so if you need me to do that, please tell me how!

So downloaded the technic launcher in order to play some of what technic has to offer and I get stuck on the sign in! The sign in asks you to sign in with a Mojang account which cannot be created anymore as it automatically sends you to Minecraft.net in order to make an account there. You Cannot use a Minecraft.net to sign in so I'm kind of stuck on what to do, I already own minecraft on a Minecraft.net account. Any help would be appreciated! How would I go about getting into the technic launcher?

When i put the mods in the server don't crash because of that, when i try to open I don't even receive a crash log, then i go to the last try log and it says that my port is already in use
I used the default server port