There are many mistakes which modern prophets can and do make, but the BIGGEST mistake is when they starting doing Bible prophecy interpretation. They ARE NOT called of God to interpret Bible prophecy, and when they start “thus says the Lord” about Bible prophecy, it IS HIGHLY LIKELY TO BE WRONG.
If it is not wrong, it will be a mere coincidence! Because they are stepping out of their calling. I have seen several of them doing Bible prophecy interpretation, even with “thus says the Lord,” and they ARE WRONG. They believe wrong end time doctrines, and it colors their entire overview of end time events.