Original Post — Direct link
It says:
{"status":401,"message":"invalid csrf token"}
almost 4 years ago - UbiExcellent - Direct link
Hello Rantala1337! I apologize for the difficulties caused while trying to link your Twitch account to your Ubisoft account. It looks like you have a Twitch account already linked, however, if this is not the correct account, I'd recommend unlinking this Twitch account from the Account Management page, then linking the correct account from the Drops website.
almost 4 years ago - Ubi-Woofer - Direct link
Hey RichardoCrispus,

Glad to hear that you've now been able to get your Twitch Account properly linked, and thank you for sharing your workaround and source!

Let us know if you need any additional assistance in the future