These errors happen regularly. Reloading the VM seems to fix it, but even that was very broken today. Often times I couldn’t connect fully 
All in all about 3h of downtime today…
Could you post here your code through a git or similar , stating the chapter and what we have to do to reproduce it? This shouldn’t happen, so its an issue that we have to have a look and fix if necessary. Thanks a lot
I have same issue, it happens occassoinally. I guess it’s receiving susbscribed message delay or network slow etc.
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We are working on looking for an optimization for that issue
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This also happens to me when I run the fetch_train script of chapter 10 on my local PC. @duckfrost Is there already a solution to this problem?
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