"closure" is not subsettable

Hi @Yulia, welcome to community!

I am a bit lost for context here. Could you kindly give a bit more information, idealing with a reproducable example? (here's a link with a bit of info on why and how FAQ: What's a reproducible example (`reprex`) and how do I do one?)

If I were to take a wild guess, you're working with a shiny app and you use a function outside of a reactive call. But that's just wild, downright-irresponsible speculation. I'm looking forward to finding out.

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