Unable to select IQ BOT Learning Instance

Hi Everyone,

I am using Automation Anywhere Community Edition to process Invoices. I have used IQ Bot to extract data from PDF. I was able to extract data using Learning Instance Process Document. But I want it in a Task Bot. For that I have called IQ Bot: Upload Document and there not learning instance showing to select. Actually Server Instance dropdown is disable. Then I was tried with assigning Learning Instance to Variable below Error occurred.  

Error : 27 : Incorrect Learning instance name.

here I my  IQ Bot: Upload Document property view 

It would be really helpful if you can help me to resolve this issue.