Unable To Run Site Locally

[bensternthal]

On a fresh install, running the site locally via npm run dev results in the following error when I view a page in a browser:

[Browsersync] Serving files from: dist
Error [ERR_HTTP_HEADERS_SENT]: Cannot write headers after they are sent to the client
    at ServerResponse.writeHead (node:_http_server:345:11)
    at res.writeHead (/Users/ben/Documents/Dev/ceph.io/node_modules/resp-modifier/index.js:140:27)
    at /Users/ben/Documents/Dev/ceph.io/.eleventy.js:139:15
    at call (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:239:7)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:183:5)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/serve-static/index.js:121:7)
    at SendStream.emit (node:events:519:28)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:270:17)
    at SendStream.onStatError (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:421:12)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:764:28)
Error [ERR_HTTP_HEADERS_SENT]: Cannot write headers after they are sent to the client
    at ServerResponse.writeHead (node:_http_server:345:11)
    at /Users/ben/Documents/Dev/ceph.io/.eleventy.js:139:15
    at call (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:239:7)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:183:5)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/serve-static/index.js:121:7)
    at SendStream.emit (node:events:519:28)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:270:17)
    at SendStream.onStatError (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:421:12)
    at onstat (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:727:26)
    at FSReqCallback.oncomplete (node:fs:197:21)
Error [ERR_HTTP_HEADERS_SENT]: Cannot write headers after they are sent to the client
    at ServerResponse.writeHead (node:_http_server:345:11)
    at /Users/ben/Documents/Dev/ceph.io/.eleventy.js:139:15
    at call (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:239:7)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:183:5)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/serve-static/index.js:121:7)
    at SendStream.emit (node:events:519:28)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:270:17)
    at SendStream.onStatError (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:421:12)
    at onstat (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:727:26)
    at FSReqCallback.oncomplete (node:fs:197:21)
Error [ERR_HTTP_HEADERS_SENT]: Cannot write headers after they are sent to the client
    at ServerResponse.writeHead (node:_http_server:345:11)
    at /Users/ben/Documents/Dev/ceph.io/.eleventy.js:139:15
    at call (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:239:7)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:183:5)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/serve-static/index.js:121:7)
    at SendStream.emit (node:events:519:28)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:270:17)
    at SendStream.onStatError (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:421:12)
    at onstat (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:727:26)
    at FSReqCallback.oncomplete (node:fs:197:21)
Error [ERR_HTTP_HEADERS_SENT]: Cannot write headers after they are sent to the client
    at ServerResponse.writeHead (node:_http_server:345:11)
    at /Users/ben/Documents/Dev/ceph.io/.eleventy.js:139:15
    at call (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:239:7)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:183:5)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/serve-static/index.js:121:7)
    at SendStream.emit (node:events:519:28)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:270:17)
    at SendStream.onStatError (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:421:12)
    at onstat (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:727:26)
    at FSReqCallback.oncomplete (node:fs:197:21)
Error [ERR_HTTP_HEADERS_SENT]: Cannot write headers after they are sent to the client
    at ServerResponse.writeHead (node:_http_server:345:11)
    at /Users/ben/Documents/Dev/ceph.io/.eleventy.js:139:15
    at call (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:239:7)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:183:5)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/serve-static/index.js:121:7)
    at SendStream.emit (node:events:519:28)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:270:17)
    at SendStream.onStatError (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:421:12)
    at onstat (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:727:26)
    at FSReqCallback.oncomplete (node:fs:197:21)
Error [ERR_HTTP_HEADERS_SENT]: Cannot write headers after they are sent to the client
    at ServerResponse.writeHead (node:_http_server:345:11)
    at /Users/ben/Documents/Dev/ceph.io/.eleventy.js:139:15
    at call (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:239:7)
    at next (/Users/ben/Documents/Dev/ceph.io/node_modules/connect/index.js:183:5)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/serve-static/index.js:121:7)
    at SendStream.emit (node:events:519:28)
    at SendStream.error (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:270:17)
    at SendStream.onStatError (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:421:12)
    at onstat (/Users/ben/Documents/Dev/ceph.io/node_modules/send/index.js:727:26)
    at FSReqCallback.oncomplete (node:fs:197:21)