Output for ldd glade
linux-vdso.so.1 (0x00007ffc7a9a4000)
liblaff.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/liblaff.so.1 (0x00007f45394a3000)
libdxf.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libdxf.so.1 (0x00007f453947f000)
libmaze.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libmaze.so.1 (0x00007f4539453000)
libgroute.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libgroute.so.1 (0x00007f4539442000)
liboasis.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/liboasis.so.1 (0x00007f453941f000)
libdrc.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libdrc.so.1 (0x00007f453938c000)
libgeom.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libgeom.so.1 (0x00007f4539300000)
libcdb.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libcdb.so.1 (0x00007f45391f9000)
libcpp.so.1 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libcpp.so.1 (0x00007f4538acf000)
libpython3.8.so.1.0 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libpython3.8.so.1.0 (0x00007f4538579000)
libGLU.so.1 => /lib/x86_64-linux-gnu/libGLU.so.1 (0x00007f45384ec000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f45384cf000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f45384ab000)
libQt5PrintSupport.so.5 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libQt5PrintSupport.so.5 (0x00007f4538444000)
libQt5Svg.so.5 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libQt5Svg.so.5 (0x00007f45383e8000)
libQt5Charts.so.5 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libQt5Charts.so.5 (0x00007f4538226000)
libQt5Widgets.so.5 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libQt5Widgets.so.5 (0x00007f4537b78000)
libQt5Gui.so.5 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libQt5Gui.so.5 (0x00007f45374d9000)
libQt5Network.so.5 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libQt5Network.so.5 (0x00007f453730d000)
libQt5Core.so.5 => /home/sudhar/Glade/glade5_linux64_ub20/lib/libQt5Core.so.5 (0x00007f4536d58000)
libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007f4536cd0000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f4536aef000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f45369a0000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f4536985000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4536799000)
libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f453676b000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f4536765000)
libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f4536760000)
/lib64/ld-linux-x86-64.so.2 (0x00007f453a227000)
libharfbuzz.so.0 => /lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007f453667d000)
libicui18n.so.66 => /lib/x86_64-linux-gnu/libicui18n.so.66 (0x00007f453636b000)
libicuuc.so.66 => /lib/x86_64-linux-gnu/libicuuc.so.66 (0x00007f453617f000)
libpcre2-16.so.0 => /lib/x86_64-linux-gnu/libpcre2-16.so.0 (0x00007f45360fc000)
libzstd.so.1 => /lib/x86_64-linux-gnu/libzstd.so.1 (0x00007f453602c000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f4535efa000)
libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f4535e40000)
libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f4535e0c000)
libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f4535d49000)
libgraphite2.so.3 => /lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007f4535d1c000)
libicudata.so.67 => /lib/x86_64-linux-gnu/libicudata.so.67 (0x00007f4534203000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f453418e000)
libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f4534050000)
libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x00007f4534017000)
libbrotlidec.so.1 => /lib/x86_64-linux-gnu/libbrotlidec.so.1 (0x00007f4534009000)
libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f4533fdf000)
libbrotlicommon.so.1 => /lib/x86_64-linux-gnu/libbrotlicommon.so.1 (0x00007f4533fba000)
libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f4533fb4000)
libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f4533fac000)
libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f4533f92000)Output for ldd libQt5Core.so.5.15.0
linux-vdso.so.1 (0x00007ffe04308000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fa15d734000)
libicui18n.so.66 => /lib/x86_64-linux-gnu/libicui18n.so.66 (0x00007fa15d422000)
libicuuc.so.66 => /lib/x86_64-linux-gnu/libicuuc.so.66 (0x00007fa15d236000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fa15d230000)
libpcre2-16.so.0 => /lib/x86_64-linux-gnu/libpcre2-16.so.0 (0x00007fa15d1ad000)
libzstd.so.1 => /lib/x86_64-linux-gnu/libzstd.so.1 (0x00007fa15d0dd000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007fa15cfa9000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fa15cdc8000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fa15cc79000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fa15cc5e000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fa15ca74000)
/lib64/ld-linux-x86-64.so.2 (0x00007fa15dd28000)
libicudata.so.67 => /lib/x86_64-linux-gnu/libicudata.so.67 (0x00007fa15af5b000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007fa15aee6000)To see if it helps I upgraded to Ubuntu 20.10 Version (Dont ask, I know dumb move)
(Running the latest build)