Not sure if you have figured this out yet or not, so if not, this should help.
Have a look at: https://www.mathworks.com/matlabcentral/answers/364551-why-is-matlab-unable-to-run-the-matlabwindow-application-on-linux
The problem is actualy in glib and not in pango, even though that is the error that you see. You need to force the installer to use the system's copy of glib, by excluding Matlab's copy of libglib.
To do this, go to the directory where you unzipped the installer. Then:
find . -name "*glib*"
You should see it in: ./cefclient/sys/os/glnxa64/ You can then:
cd ./cefclient/sys/os/glnxa64/; mkdir Exclude; mv -i libglib-2.0.so libglib-2.0.so.0 libglib-2.0.so.0.5600.1 Exclude/
This will remove the Matlab version of glib, forcing the installer to use the system's version (which defines g_ptr_array_copy).
This is tested and works with Tumbleweed 20200905.