Hi everyone,
We are in touch with organizers for providing the new timeline for Round 5.
As of now, the expected date for the launch the submission deadline is 14th May 2021 (here).
Regarding the submissions, you will, unfortunately, need to wait for the updated starter kit to release.
It will still be following a similar structure so you can start with your code and submit it later.
The starter kit will be released along with the challenge launch.
Apologies for keeping you waiting, but in the meantime, I hope you all might be having fun with the latest dataset released for Round 5! 
You can always share some nice insights with fellow participants as community contribution in the Notebook Section.
UPDATE: Submission close date is 14th May 2021, and not the challenge launch.