Task "Task causing issue" Start No Later Than August 2, 2021, 12:00 AM constraint is conflicting with Dependency (End-to-Start) from "Summary causing issue" to "Task causing issue".
Since the upcoming 4.3.0 release (or 5.0.0 ..not sure which version it will be called) handling of such issues will be much simpler:
Generally speaking all Start/Finish no later than and Must Start/Finish On constraints could potentially result scheduling conflicts. So need to be careful when using them.