"Unity Application is running..." while uploading Unity to VRChat

I have an avatar designed in Unity. When trying to upload it to VRChat using VRChat SDK. It works for a while and then stops with "Unity Application is running…Stop it to access the Control Panel ". At this point the Scene window switches to Game and the play button is showing as activated. Pressing the play button refocuses to the VRChat sdk panel, however it resets.

I feel I am missing something obvious here. Have checked versions for the VRchat SDK and Unity, and am running the current (appropriate) ones.

Any ideas?

They can probably help you better over here

Edited to fix link. Old link here:
over here.

Thanks.:slight_smile: