I'm pretty new to the Developer community and developing and have just stared learning to create widgets for WebApp Builder. I attempted to utilize the uniqueValues function and received a 404 not found error. After doing a bit of looking around I found that the API version for WAB is only 3.39 and the script can be found in version 4.23.
My question is, is the WAB application stuck with API version 3.39 and is there a 3.39 version of the uniqueValues Function?