My be it is an network issue OR your internet connection is slow in loading the scripts of Boomi Build tab. But Ideally it should not be the case and in order Boomi to load fast we need a notable internet speed. In my case I faced like this and changed my internet connection speed and it is working fine. Also, what browsers we are using to work with Boomi is also important. Happy Exploring Boomi.
Retrieving data ...