Chrome can't update itself. When I redownload it still isn't updated. I'm stuck in a loop. Can anyone help?

I have used google chrome for many years, never had a problem with updates. Today my work email didn't load properly so I restarted my computer then checked to make sure the software was up to date. When I try to update I get an orange box saying "chrome couldn't update to the latest version". When I try to reinstall the program the newly installed version has the same problem.

Has anyone experienced this before? The google help pages don't have this problem. I have a macbook air