NexisDAO tweeted on December 2 that the website will be closed in one month. If you have minted dCKB or borrowed TAI on NexisDAO, please redeem your collateralized assets as soon as possible!
You can find the step by step guide on how to redeem your CKB (dCKB —> CKB) here 
https://jackylhh.notion.site/NexisDAO-5d306c5154784711b195007e150cd71a