Error : invalid 'nchars' argument

Dear Dean,

I encounter some troubles while trying to run a shinform (even the examples you provided on your page).

Everytime I try to run an app, the following error message appears in the Internet browser window and on the R console :
Error : invalid 'nchars' argument

Could you please help me finding what the cause is?

Thanks.

Start by running the examples referenced in the issue and compare the browser error with the R console output. Trace where the invalid 'nchars' argument is produced, using the example app as the entry point. Done means the provided examples run without this error in both the browser and R console.

Written by the indexing model from the issue text.