FTB launcher "Failure handshake"

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Forest Dragon

New Member
Dec 8, 2019
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Hello,

so, since Twitch support has officially ended, i can no longer log my modded Minecraft with it. It will say a bunch of errors while trying to log in to the server me and my friends are playing at.

I said okay, lets use the old FTB launcher, no problem. Thing is, while starting the launcher, i noticed that it gave error "Handshake failure" and i cannot log in with my Mojang account. I am posting debug from the launcher here. Could you please tell me what should i do to get it working? Thank you.

Disclaimer - i have launched Vanilla minecraft by its default launcher at least once and logged in without problems
 
Last edited:

grandrolf

Global moderator
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Aug 29, 2014
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sweden
Uninstall all java, then install the latest java 8 64-bit version - try again and if it still fails, follow instructions found here on how to share full log:
https://support.ftb.world/
 

Forest Dragon

New Member
Dec 8, 2019
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3
Hello, thank you for the reply, I have uninstalled Java from my computer, then i downloaded the offline latest version for Windows 10 64-bit on my computer and installed it.
When i launched the client, it no longer said anything about "Handshake_failure" however i am unable to log with my mojang.net account. I have tried logging both with my e-mail and username, both give me failure to log in.
I have logged with the exact same login onto minecraft.net without any problems. Moreover, when i look over the "debug" version of the console, it still shows some error logs.

Here is the paste of the full log in Debug version console. Had to create it manually.
https://paste.feed-the-beast.com/view/691708f6
 

Forest Dragon

New Member
Dec 8, 2019
3
1
3
Hello, I have no idea if trying it for the umpteenth time resolved it or you guys worked your mojo, but i am able to log normally now. Thank you. You can close this thread now.
 
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