I can't seem to figure out what this is talking about. I've tried to change my settings, but nothing works.
This is what it says.
These are my settings. I can't find anything that is 1171x658.
You actually do have your render set to 1171 px wide.
Look at the "Percentage Scale" value directly below the width and height under the Dimensions category of the Render tab of the properties window. It is set to 61%, and
1920 x 0.61 = 1171.2.
Simply set the "Percentage Scale" to 100% and you will be rendering at the expected 1920 by 1080.
Some output encodings, especially the highly compressed (e.g. h.264) encodings, have special requirements, i.e. width/height need to be divisible by 2 or even 4.
Your width is (rounded) 1171, use a slightly different "Percentage Scale" value as described in the other answer or change the output format.