Hi Michael - in order to install ReportLab package, you must also have pillow package and ensure you have the correct version of python. When you install ReportLab, it will do this on its own.
According to the instructions to install ReportLab in Fire Service Maps, if you are running ArcGIS Pro 2.2, you need to clone the default python environment first.
Currently, I am only running this on my computer. Still new to ArcGIS Pro and AGOL. Trying to learn.