PSD "Object reference not set to an instance of an object" errors when creating media

I installed PSD on a fresh copy of Windows Server 2019 based on the installation guides in the repo. When trying to create a new image, I get the following errors:

Starting MDT Media Update
Opened the media deployment share.
Folders to be copied to the media deployment share: 8
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Applications
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Operating Systems
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Operating Systems\Source
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Operating Systems\Custom
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Out-of-Box Drivers
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Packages
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Task Sequences
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Selection Profiles
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Applications with Replace option
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Operating Systems with Replace option
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Operating Systems\Source with Replace option
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Operating Systems\Custom with Replace option
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Out-of-Box Drivers with Replace option
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Packages with Replace option
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Task Sequences with Replace option
Object reference not set to an instance of an object.
Copy errors encountered, copying will continue: 1 error(s) reported.
Copied: PSD001:\Selection Profiles with Replace option
Copied standard folders.
Boot images updated.
Setting up x64 boot image.
Boot configuration editing completed.
Reset read-only attributes.
Successfully created media ISO.

(I was also getting the file not found errors described in #112 , but I resolved them by copying everything from the Scripts directory in another MDT share (one that was created using MDT) to the Scripts directory in the PSD share.)

The media is created, however, it doesn't contain any task sequences (even though I selected the "Everything" profile).