Update:
It happened again today. ExB prompted for credentials and I knew from my experience that my apps will vanish and it did. No response from ExB team.
Original Post:
It happened to me twice so far in version 1.9 and 1.10 of ExB.
After few weeks of working and creating apps, I am prompted by ESRI to verify my account again by entering the portal address and then the id of a ExB project posted on the portal. After the authentication completes, all the apps from the ExB screen disappear. However, the apps are still listed under the server/public/apps. I can see the apps, if I enter the url as "https://localhost:3001/builder/?id=x" where x is the project id.
I contacted ESRI tech support (#03250331) and after quite few interactions, we found out that the version 1.8 does not exhibit the same issue. So, I was advised to downgrade to version 1.8 until the issue is resolved. I was advised to post my case here, so I bring it to the attention of the ExB team. Thank you.
@Jianxia @TonghuiMing @Grant-S-Carroll @ShengdiZhang @AlixVezina @Richard_Purkis