'new_weakref' is not an exported object from 'namespace:rlang'

[neelan29]

I am trying to run an R Shiny app from my R Studio. Everytime the app runs, I get the following error:

I made sure I am using the latest version of rlang. But this error doesnt seem to go away.

Any help on this would be really useful.

[lionel-]

What does devtools::session_info() and rlang::new_weakref return?

[neelan29]

They return the following:

[lionel-]

And sessionInfo() and getOption("repos")?

[neelan29]

They are as follows:

[lionel-]

From sessionInfo() you have rlang 0.4.2 installed which is the right version. There must have been an installation issue, but I'm not sure how to help you. You definitely should be able to see a function when you type rlang::new_weakref if rlang is correctly installed.

Have you reloaded R after installation?

[neelan29]

No, i havent done that after installing the latest version of rlang. Do you recommend restarting R?

[lionel-]

Yes restarting R after updating packages is needed because packages generally can't be unloaded and reloaded properly.

[neelan29]

thanks a lot! restarting R did the trick.