plugin does not work after upgrading to 2016.3

Hello,

I have a plugin that I enhanced from another intellij plugin.

I have a version of intellij 2014 / 2015 / 2016

for some reason the plugin used to work on version 2016.1 but after upgrading to 2016.3 it does not work ( woks partially )

among other things the plugin generates another view.

for some reason instead of my view I see this:

This view is not available until indices are built.

even when this message is gone I still can't see my view.

any pointers?