Hello Organizers, I'm registered as a participant and want to submit Task 1. When I navigate to the submission page, I see an error: "Please join a Submission Team before continuing." Is team registration available now, or does it open together with the Validation Leaderboard on May 21st? If it's available now, could you point to instructions for creating/joining a team? Thanks!

Created by Andrés Felipe Romero Grajales afromerogr
Hi @CALADAN, It will become available by tomorrow evening CET. Best regards, /Mehdi
When should we expect task 1-3 evaluations to start?
Hi @fangyi I can see your team has a submission. The leaderboard will be available soon (the next few days). Best regards, /Mehdi
I also submit one for testing. (Task5) I don't know where to see the prediction status and results. The leaderboard sill shows "coming soon" @vchung
Hi @shubham.innani , Yes, the Evaluation Queue for challenge 5 is live ! And I do see that your team has already made a submission.
Hi @vchung, Is the submission portal live for Challenge 5? I see that 1st June it would be live, still waiting for it. Let us know if there any updates.
Hi @ale_linde , The opening of the submission queues is currently delayed while we finalize the evaluation scripts to ensure accurate and fair scoring. We plan to open the queues --later this week, with a projected opening date of tomorrow, May 28th.-- next week on Monday, June 1st. We had posted an update to the [News tab](https://challenges.synapse.org/Challenges/DetailsPage/News?id=syn74274097), but we'll make sure to cross-post all future announcements directly to this Discussion Board as well, so they are easier to spot. Thank you so much for your patience! EDIT: opening date
Dear organizers, I am registered for the BraTS 2026 challenge and I can see the challenge under my Synapse profile. On the Task 1 page I also see the “Leave the challenge” button, so my challenge registration seems active. However, when I try to submit a file, no evaluation queues are shown, and in some cases I get: “You are not currently participating in an Evaluation/Challenge. Please join one and try again.” Could you please confirm whether the Task 1 evaluation queue is already open and whether participant permissions (Can Submit) have been granted to registered users/teams? Thank you
Hi @afromerogr, That error usually means your registration is not quite finished yet, as joining a team is the final step! (Sorry if that wasn't made clear) When you're on the [challenge page](https://challenges.synapse.org/brats2026), does the button text still say "Register for this Challenge"? If it does, here is how to complete registration: 1. Click on the **Register for this Challenge** button again 2. A pop-up window will show with the Challenge Terms & Conditions. Since you have already agreed to the terms, go ahead and click **Continue** 3. On the next page is where you can create a new Submission team for the challenge or join an existing one You'll know you are good to go when the registration button is replaced with a **Leave Challenge** button. As a reminder, you can upload your files now, but the submission queues don't open until May 21st. Hope this helps!

Submission Team registration — available now or only at validation phase open? page is loading…