Open your
Mixer, press the
All button so it is blue, and carefully scroll sideways until you see a lit
Solo button. Deactivate it.
Flashing mute buttons always indicate something soloed.
If no solo button is lit but there are flashing mutes:
You could also be in *Solo Mode*, where whatever is selected, is soloed. The timeline gets yellowed in *Solo mode*, as does the selected region(s). You can toggle *Solo mode* by hitting
s.
regards, Erik.