Plotting error: "Bundle#83 start failed", with 2019a on MacOS Mojave?

I have been helping somebody with their Matlab use: they have recently installed R2019a on a new MacBook Pro, running Mojave. Much of it works fine, but when attempting to plot; the following error is produced:

Bundle#83 start failed: dlopen(/Applications/MATLAB_R2019a.app/bin/maci64/builtins/matlab_graphics_chart/mwlibmwchart_builtinimpl.dylib, 5): Library not
loaded: @rpath/libmwmathcgeo.dylib
  Referenced from: /Applications/MATLAB_R2019a.app/bin/maci64/libmwhandle_graphics.dylib
  Reason: no suitable image found.  Did find:
	/Applications/MATLAB_R2019a.app/bin/maci64/libmwmathcgeo.dylib: truncated mach-o error: segment __LINKEDIT extends to 10445024 which is past end
        of file 10445022
	/Applications/MATLAB_R2019a.app/bin/maci64/./libmwmathcgeo.dylib: truncated mach-o error: segment __LINKEDIT extends to 10445024 which is past end
        of file 10445022
	/Applications/MATLAB_R2019a.app/bin/maci64/libmwmathcgeo.dylib: truncated mach-o error: segment __LINKEDIT extends to 10445024 which is past end
        of file 10445022
	/Applications/MATLAB_R2019a.app/bin/maci64/./libmwmathcgeo.dylib: truncated mach-o error: segment __LINKEDIT extends to 10445024 which is past end
        of file 10445022
	/Applications/MATLAB_R2019a.app/bin/maci64/builtins/matlab_graphics_chart/../../../../bin/maci64/libmwmathcgeo.dylib: truncated mach-o error:
        segment __LINKEDIT extends to 10445024 which is past end of file 10445022
	/Applications/MATLAB_R2019a.app/Contents/MacOS/../../bin/maci64/libmwmathcgeo.dylib: truncated mach-o error: segment __LINKEDIT extends to
        10445024 which is past end of file 10445022

Naturally I did a Google search, but I couldn't find this error described anywhere. I have no idea what it means: I've been using Matlab for decades, and I thought I'd managed to prodice most errors with my bungling, but this one is completely new to me.

What is going on here, and how can we get past it? We have deleted and re-installed R2019a, to get exactly the same error again.

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/51803-can-t-declare-symbolic-variables

[Alasdair McAndrew]

Thank you for your reply. But we have deleted and re-installed, and this is not an error with symbolic variables; a simple command like

plot([1,2,3],[3,2,1])

will trigger the above error. And as I say, it's both a new system, and a new Matlab.

[Alasdair McAndrew]

It seems that the library file

/Applications/MATLAB_R2019a.app/bin/maci64/libmwmathcgeo.dylib

is faulty. We replaced it with one from an older Matlab on another machine and everything is working as it should. Given that Matlab was installed using the installer downloaded from the Mathworks website, this means that either

1. The installer has a fault, and is pulling down the wrong files, or is halting before files are fully down loaded, or,
2. Mathworks has bundled an incorrect library file with R2019a for MacOS.

This should be checked!