ddev: 502 Bad Gateway and then DDev stops working - all projects won't start, "failed to read the CA certificate: unexpected content"

Describe the bug While working on a project, updating twig code, all of a sudden the project will return a 502 bad gateway error in the browser.

Stop Ddev and then run DDEv start and get the following error:

Failed to start project-name: ddev-router failed to become ready: logOutput=, err=container exited, please use `'ddev logs -s ddev-router`` to find out why it failed

running ddev logs outputs this:

Using the local CA at "/root/.local/share/mkcert" ✨        
ERROR: failed to read the CA certificate: unexpected content

I then ran ddev poweroff and restarted - got the same issue. Rebooted compuger and got the same issue.

Am unable to work on any projects at this point.

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Version and configuration information (please complete the following information):

• Host computer OS and Version: Windows 10
• Docker version information 19.03.8
• ddev version information 1.14.2
• config.yaml contents for the misbehaving project – APIVersion: v1.13.1 name: compugen-new type: php docroot: public php_version: “7.3” mysql_version: “5.7” webserver_type: nginx-fpm router_http_port: “80” router_https_port: “443” xdebug_enabled: false additional_hostnames: [] additional_fqdns: [] nfs_mount_enabled: false provider: default use_dns_when_possible: true timezone: “” host_db_port: “32890”
• Do you have any custom configuration (nginx, php, mysql) in the .ddev folder? no

Additional context This is the full output when running ddev start

λ ddev start
Starting compugen-new...
Building ddev-ssh-agent
Creating ddev-ssh-agent ... done

ssh-agent container is running: If you want to add authentication to the 
ssh-agent container, run 'ddev auth ssh' to enable your keys.
Pushing mkcert rootca certs to ddev-global-cache
failed to copy root CA into docker volume: container run failed with exit code 1, output=''
Pushed mkcert rootca certs to ddev-global-cache
Building db
Building web
Creating ddev-compugen-new-db ... done
Creating ddev-compugen-new-dba ... done
Creating ddev-compugen-new-web ... done

Creating ddev-router ... done

Failed to start compugen-new: ddev-router failed to become ready: logOutput=, err=container exited, please use 'ddev logs -s ddev-router` to find 
out why it failed