500 iinternal server error when attempting to set up new site

Getting a 500 Internal Server Error (at this point), previously was not able to find the site at all. Was (briefly) able to access the (empty) WP site after changing the site domain to test.independent3.dev, but have not been able to access the admin area, so cannot install the All-in-One WordPress Migration plug-in and import the existing site that I want to work on. Upon checking the directory for the site, I am not seeing a WordPress installation at all. I was able to do this two days ago on a different Local by Flywheel test site (since deleted due to unrelated issues). I have tried quitting and restarting Local by Flywheel. I have also used the “Start All” and “Stop All” buttons, to no avail.

Log file for Local by Flywheel for 27 April 2017 is available, but exceeds the allowable character count.

Mac OS 10.11.6