The file 'getIpOptions.m' should be stored in the directory identified below. You can run this line of code which should open the directory where this function is stored and look for that function (for Windows):
If the file exists, the path has somehow been removed. You may restart MATLAB and see if the problem goes away. If it doesn't go away, check your startup.m file (if that file exists) to determine if you're removing important paths. You could also try running
If the file does not exists, you can reinstall Optimization Toolbox to resolve the issue.