Hi, I am getting this message "Cannot set properties of undefined (setting 'useDataSources')" in a number of web apps created with Experience Builder. Those apps were properly working until yesterday.
Maybe a temporary problem? Someone could help me?
Solved! Go to Solution.
I am experiencing the same issue with one of my Experiences. https://experience.arcgis.com/experience/ccd3382204364f3da259e089158d6803
I am currently chatting with ESRI Support. I will let you know if they have anything to say.