Druid indexer web console doesn't open

So im testing druid and was feeding it a small batches or ingestion from S3 -> and web console was working fine.

But then I’ve decided to start feeding it a real data and it seems like indexer console chokes.

It takes a long time to load -> an then it doesnt show any information in it:

How would I find out what exactly is the problem?

Have you tried hard refreshing the page? I see that happen sometimes due to browser caching.