I am trying to launch Experience Builder from my AGOL account and keep getting the error message "“Cannot read property ‘background’ of undefined”. This is not consistent and occasionally/rarely can get through. This is also happening for 5 others in my team from our organizational account. All other web apps work fine.
It doesn't happen with another organizational account we manage for a customer so isn't PC, network related (we all work from separate locations).
Only changes recently have been to our short url for AGOL, accepted the HTTPS requirement and accepted the template Homepage for AGOL.
All users are User Type = Advanced and all have the Addons for the web apps.
This is stopping a significant development for us using the new & updated tools from Esri so would like it resolved. Any input and ideas really appreciated.
This issue is caused by the header, button, or body properties in the sharedTheme object returned from the Portal to be null. Usually, it would return an object as:
{ header: {}, body, {}, button: {}, ... }, which the properties are not empty.
I will look into this, and in the meantime, please add a logo, or colors to the header, button, or body to force the sharedTheme to not be null.
