Out of video memory trying to allocate a rendering resource. Make sure your video card has the minimum required memory, try lowering the resolution and/or closing other applications that are running. Exiting....
This error occurs when your GPU runs out of memory during the file load process. As you mentioned adding vegetation to your scene before this started to occur, it is likely that the added vegetation is what is causing the increased VRAM usage.
If you have a backup copy of the file before you made these changes, I recommend reverting to that backup copy.
If you do not have a backup copy, some things to try that may help are:
Launch Twinmotion, then adjust your Quality preset to Low, then try opening the file again.
Try changing your Graphics Hardware Support setting from DirectX 12 to DirectX 11, then try opening your file.
If you have access to a computer with a more powerful graphics card, try using that computer to open your file.
If you can open the file, try removing the recently added vegetation so you can launch the file normally again.
