Here is the response I got from a Pulseway team member:
There are some known issues.
We are ready with the update and have released to 15 early access customers. 8 out of 15 early access customers have reported that some systems have upgraded correctly and some have encountered problems.
Here's the list of known issues with the KES 10 SP2 MR3 update:
a) Fresh installation might fail if the system had KES 10 SP1 MR3 installed, upgraded to 1903, Windows automatically uninstalled KES 10 SP1 MR3. Workaround: Run the KAV removal tool and install all a