Template render error

Template render error: (/opt/build/repo/node_modules/@frctl/mandelbrot/views/pages/components/detail.nunj)
  Template render error: (/opt/build/repo/node_modules/@frctl/mandelbrot/views/partials/pen/browser.nunj)
  Template render error: (/opt/build/repo/node_modules/@frctl/mandelbrot/views/partials/browser/browser.nunj)
  Template render error: (/opt/build/repo/node_modules/@frctl/mandelbrot/views/partials/browser/panel-context.nunj)
  TypeError: Cannot convert undefined or null to object
    at Object._prettifyError (/opt/build/repo/node_modules/nunjucks/src/lib.js:36:11)
    at /opt/build/repo/node_modules/nunjucks/src/environment.js:567:19
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :44:11)
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :64:12)
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :150:12)
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :216:12)
    at /opt/build/repo/node_modules/nunjucks/src/environment.js:575:11
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :20:11)
    at /opt/build/repo/node_modules/nunjucks/src/environment.js:575:11
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :54:12)
    at /opt/build/repo/node_modules/nunjucks/src/environment.js:575:11
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :75:12)
    at eval (eval at _compile (/opt/build/repo/node_modules/nunjucks/src/environment.js:637:18), :17:11)
    at bound (node:domain:433:15)
    at runBound (node:domain:444:12)
    at tryCatcher (/opt/build/repo/node_modules/bluebird/js/release/util.js:16:23)