I upgraded my Mikrotik Powerbox Pro to 6.42.1 due to the winbox security issue. I am not getting overload POE errors on a port that is connected to a Nanostation M2 Loco. Anyone else having this issue or can offer a fix?
Could you paste fragment of logs with poe errors? And poe configuration?
I had some issue with poe-out setting, when I select poe-out: auto on it seems that waiting for load. when I select forced on device that connected to ethernet start working. but if I select poe-out: auto on device not working.
Attached is a screenshot of the log and the POE tab for the interface.
Is nobody else having this issue?
No, PoE works in 6.42.1 correctly for me same as with previous versions. Did you try to connect different device?
have you got same issues at the version before 6.41?
Poe-out logs where added quite recently (version 6.40) - maybe you had that problem all the time but you noticed only now because of logs?
Is there other poe devices connected to your PowerBox? If total consumption reaches 2.4A (with 24V power supply) then poe-out port with lowest priority (in your case it is most likely ether5) will be powered down and overload event would be logged.
Try moving your nonostation to different poe-out port (ether2 has highest priority in default configuration) and check if problem moves with device.
I have the same thing. The device is overloaded with 3 Ubiquiti Prism. With two is OK. 
Ver.6.42.6
How are you powering the powerbox? I seem to remember reading recently (can’t remember what thread) that you will get this if it is powered by PoE but not if it is by mains DC jack.
As always on an Ethernet cable to the first port. CAT-5 about 15 meters. Power supply 24v from the Powerbox old type.
I had same issue and change psu solve the problem.
I am running 6.42.7 on a power box pro 960PGS
Had the same problem with a UBNT gen 2 rocket prism with POE-OUT set to auto-on. I had to set it to forced-on to make it work. I am powering directly from a battery bank to the DC input jack, I am NOT using POE-IN.