Install libn32stdc++6-6-dbg-mipsel-cross by entering the following commands in the terminal:
sudo apt update sudo apt install libn32stdc++6-6-dbg-mipsel-cross
GNU Standard C++ Library v3 (debugging files)
This package contains the shared library of libstdc++ compiled with debugging symbols. . This package contains files for mipsel architecture, for use in cross-compile environment.