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Debian 9.3 GUI installation failure

I tried installing Debian 9.3 today. I used the netinst CD amd64 version.
All was going well until about 4/5ths of the way through ...
I suddenly got an error message about "ispell" and that something "british" couldn't be installed.
(I chose "US" throughout the whole process; I'm not sure why it's installing something "british.")
I'm sorry I don't have more details. There's no way for me to capture the screen or the text.
After the notice, it gave me the option to return to "install packages ..." to fix the problem.
However, when I click "Continue" and go back to "Select and Install Software," all it does is repeat the notice that "An installation step failed ..."
I cannot continue the install process. The next step is bootloader installation.
The system is not bootable; I have to restart from scratch.
Is this a bug? DId I do something wrong? What can I do to avoid this problem before investing another 2 hours?
- Liam