IWAN app is failing after upgrading. Before this upgrade didn't had any issues. but now the IWAN app is complaining for incompatibility.
upgraded the controller from 22.214.171.124 -> 126.96.36.1999. That was it.
You should upgrade the base controller before upgrading the iwan app.
upgrade IWAN app from 1.3.1 -> 1.3.2 ( controller was running 1.3.2)
Then upgrade APIC from 1.3.2 -> 1.4
Then upgrade IWAN app to 1.4
In 1.3.2 we implemented "app separation" which means the releases of IWAN app are separate to the controller. The nice thing about this is you will see an increased cadence in IWAN app releases, just need to be aware that there will be some requirements to upgrade the base platform as well.
Lots of good things in IWAN app 1.4