When ever I change the choices in the R Shiny error occurs: ERROR: value 'NA' not found in choices Warning: attributes are not identical across measure variables; they will be dropped""

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

Please have a look at this guide, to see how to create one for a shiny app