Selected file to graph

[nirgrahamuk]

@corine.marcon

At the end, it works, but I wish I didn't get this message.

Seems like there is a lack of understanding is to how it eventually works ?

You can try the shiny debugging guide and use debug() or browser() to research you application yourself.
Otherwise if you would like support from the forum you are encouraged to make a reprex.

Shiny debugging and reprex guide

Shiny issues can be challenging to resolve relative to other problems with your code or statistical methods. Shiny apps are often large, complex projects with interacting files. When seeking help from others it is considered polite to: First, do your best to work through RStudio's debugging tools to diagnose your issue on your own. Often those shiny logs and tracebacks are useful to others trying to help out. Second, strive to minimize the effort required to replicate your issue. You can do this with a reproducible example ("reprex"). Shiny Debugging Errors in Shiny code can be difficult to track down. If you don't know where your problem is coming from, you can track it down with some o…