If you're seeing a black screen after adding our plugins to your timeline, most commonly the problem that you've encountered is a result of corrupted font duplicates and/or corrupted font databases – in such situation DaVinci Resolve is simply not showing plugins' contents.
To see if that's the case, you can place our preset on the timeline and switch to the "Console" view of DVR. If it shows font-related errors, follow the instructions mentioned below.
Go to mInstaller's Settings and use the [Fix] Fonts option.
Next, open the Terminal.app (you'll find it in your Applications > Utilities folder), copy-paste the following command, and press Enter (be sure to type in your admin password when prompted):
sudo atsutil databases -remove
Once the command has been executed, restart your Mac.