Installed latest Premiere2015.3 last week and also installed beta of the AVP 2.5 latest build.
Now all clips which had previously had GoPro VR Reframe effects in them, the plugIn is no longer recognised and when i try to drop the plug in back onto a clip it crashes premiere with following error message.
For this problem it seems that there's a conflict between mettle VR player plugin and GoPro VR player. A temporary solution is to delete/uninstall Mettle VR player