ePMP 2000 AP and SM's shows offline in cnMaestro

ePMP 2000 AP and Force 180/200 SM's shows offline and transmitter power off in cnMaestro but SM's connected and GPS sync is up. AP & SM's running 3.55 Firmware. Both AP & SM show "Good" in Powercode. How do I get AP & SM's to show online?

@crescomm 

Is this Cloud or On-premises? if cloud, please upgrade AP or one of the SM to 3.5.6 software version and check the result. 
    Or 
Enable below option "Auto update for ePMP devices" and share us the outcome. 


If on-premises, please share the sysog output from the device.