$ ccsm
Traceback (most recent call last):
  File "/usr/sbin/ccsm", line 31, in <module>
    import compizconfig
ImportError: libprotobuf.so.18: cannot open shared object file: No such file or directory

$ fusion-icon
Traceback (most recent call last):
  File "/usr/sbin/fusion-icon", line 59, in <module>
    from FusionIcon.interface import choose_interface
  File "/usr/lib/python3.8/site-packages/FusionIcon/interface.py", line 22, in <module>
    from FusionIcon.util import env
  File "/usr/lib/python3.8/site-packages/FusionIcon/util.py", line 22, in <module>
    import os, compizconfig, time
ImportError: libprotobuf.so.18: cannot open shared object file: No such file or directory

$ compiz --replace ccp & emerald --replace &
[1] 2887
[2] 2888

$ compiz (core) - Error: Couldn't load plugin '/usr/lib/compiz/libccp.so' : libprotobuf.so.18: cannot open shared object file: No such file or directory
compiz (core) - Error: Couldn't load plugin 'ccp'
compiz (core) - Error: Couldn't load plugin '/usr/lib/compiz/libccp.so' : libprotobuf.so.18: cannot open shared object file: No such file or directory
compiz (core) - Error: Couldn't load plugin 'ccp'

$