I was able to play on a friend's server as of 2/24/18. Now, 2/25/18, when I start the game, 9 times out of 10 it crashes to a white screen on the Mojang logo screen. I've set an exception to the launcher in my anti-virus, run malwarebytes to get rid of any malware blocking the files from running, disabled windows firewall, restarted my computer, ran a java-kill command to prevent other instances of java from interfering, and I run the launcher as administrator. I also deleted the .technic folder and the technic launcher, as well as Minecraft and reinstalled both. I can't think of anything else I could do.
According to the linked thread, the
[B#355] SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
[B#355] SLF4J: Defaulting to no-operation (NOP) logger implementation
[B#355] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
section is irrelevant.
[B#355] File version.json not found in C:\Users\Brennan2\AppData\Roaming\.technic\modpacks\tekkit\bin\modpack.jar
is the only other section that shows in red in the technic launcher logs, which leads me to believe this is where my problem lies. version.json exists in that folder, but something must be blocking it from being read. Maybe 1 out of 10 times I will reach the title screen and can select my friend's server to play on, but the crash happens before I can load into the server at that point.