Hi Lorin,
From the logs, it looks like you are using Qt 4.
"runtime" in pgadmin4 has been tested with Qt 5 and recommendation to compile the "runtime" is with Qt 5.
Can you please try to build the project with Qt 5 and let us know the result ?
If you can solve the error with Qt 4 environment then send us the patch file with fix. It will be good start to contribute to the community.
Thanks,
Neel Patel