Packet encoder and decoder in gnu radio 3.8

Hi,

I am using raspberry pi 4 with gnu radio 3.8 and pluto sdr

i have run qpsk in gnu radio 3.7 . it worked fine.

But in GNu radio 3.8 i cannot find the packet encoder and decoder blocks .

how to implement the qpsk modulation and demodulation of a text file in the gnu radio 3.8

are there any replacements for packet encoder and decoder in GNU radio 3.8

Please Help.

Thank you,