Hi,
 
I have L-Phase Multiband compressor version 1.0.3.84 installed on Win10 x64.  I can insert the VST to a track, and see the knobs turning at the bottom of the plugin window when signal is present, but the FFT waveforms are not displayed.  
 
My video driver (AMD Radeon 6750) shows OpenGL Version 6.14.10.13417 the LP-MB shows "System OpenGL Version: 4.5".
 
I have tried Pre, Post and Both settings in LP-MB>Expert window. I have re-booted.
 
Does anyone have a suggestion for how to fix this?
 
Thanks!
 
JBC
 
 

all I can advise to make sure the plug in is not bypassed. (weather that be on the plug ins GUI or in the FX bin.
Sometimes accidentally I have by passed a plug in by using the power on/off button in the FX bin.

Thanks @chuckebaby, it's not bypassed. But you got me thinking.  I removed it from the channel and re-added it and now it's working as expected.