Hi Ahmed,
I replaced all of the EDFA Black Box components with the Optical Amplifier component, because there seems to be a bug with the black box component when using the ASE. The project works fine now, except the signal is very noisy, you may want to change either the photodetector settings to lower the thermal noise or increase the gain of the amplifiers from 0.3 dB to something larger.
Thanks for bringing this to our attention and we will provide a fix to this issue in the future!