When clicking on the button while having the console open, I see that the

LaunchAssetLoaderQuery

respond with a 502. It is probably a timeout issue because I try to load many partitions at once (around 100k).

It is a regression since the previous version I was using (1.0.17) as I can’t launch any run and backfills manually from the UI. I hope you will figure this out 🙏

Update: I just tested this locally on a fresh DB and the popup asking to select partitions for the runs is showing up. It confirms that the issue is likely related to too many partitions to fetch, thus having the server to timeout

For more context on this: I have a partitioned job built with

define_asset_job

with 6 assets and with a 15 minutes time window partition since 2022-01-01

done: https://github.com/dagster-io/dagster/issues/11157