Arduino 1.8.4 compiling issue

After downloading and installing 1.8.4, etc., I get the following error message when trying to compile/upload Blink, which is about as simple a program as it gets:

exit status 1
Error compiling for board Arduino/Genuino Uno.

Has anyone seen this before or know how to fix it? The code is the standard Blink with no changes made to it by me or anyone else.

Suggestions appreciated!

Thanks,

Frank

When you encounter an error you’ll see a button on the right side of the orange bar “Copy error messages”. Click that button. Paste the error in a message here USING CODE TAGS (</> button on the toolbar).