because use kodi
/usr/lib/kodi/kodi.bin: error while loading shared libraries: libmariadb.so.3: cannot open shared object file: No such file or directory
https://forum.manjaro.org/t/qgis-not-launching/35269/7
change libmariadbclient is ok
But phpmyadmin use libmysqlclient
So there is conflict
What should I do
Welcome to the forum! 
Classic XY problem. Please edit your topic title to reflect what the actual problem is, not your imagined solution.
Are you fully up to date? See Pacman-mirrors - Manjaro
libmariadb.so.3 is provided by mariadb-libs which is a dependency of kodi.
phpmyadmin depends on mysql-clients which mariadb-clients provides which depends on mariadb-libs.
Please also see: