I have been using this great multi select DropDown add-in in my main development app as a custom component. Recently, I see a message in the design page “Error instantiating token_box”, even though this whole custom component still runs correctly when my app is started. So it is a cosmetic issue. But I still would like to find out the source of the error and make sure it does not affect the performance of our app.
You can get a clone of the multi select dropdown I use from the link below.
Could someone help a bit? Many thanks,