Hi,
This does sound like a graphics issue. The NVIDIA link posted by @Nicolas Goutte works well. For an AMD version you may need to create an application profile. See here: https://www.amd.com/en/support/kb/faq/dh-012#Link13
If this doesn't help then I suggest you try resetting your user folder and running the repair tool.
User folder reset:
Close Vectorworks > Start > search %appdata% > Nemetschek > Vectorworks > rename 2019 to something like 2019old so you have a backup of your preferences.
Repair tool:
Close Vectorworks > File Explorer > navigate to Vectorworks 2019 Updater folder within the program folder (be default it will be located here: C:\Program Files\Vectorworks 2019\Vectorworks 2019 Updater) > run the updater program > let it refresh if needed > Advanced Options > hold Alt and click Repair.
I hoe this helps you @frozenwaffles
Ragards
Adam Robinson