TypeError: URL is not valid or contains user credentials.

[komagata]

View details in Rollbar: https://app.rollbar.com/a/komagata/fix/item/Bootcamp/1737

TypeError: URL is not valid or contains user credentials.
  File "[native code]", line unknown, in fetch
  File "webpack:///./app/javascript/user-icon-renderer.js", line 2, in [anonymous]
      async render(selector) {
  File "webpack:///./app/javascript/user-icon-renderer.js", line 2, in [anonymous]
      async render(selector) {
  File "webpack:///./app/javascript/user-icon-renderer.js", line 2, in [anonymous]
      async render(selector) {
  File "webpack:///./app/javascript/user-icon-renderer.js", line 2, in [anonymous]
      async render(selector) {
  File "webpack:///./app/javascript/user-icon-renderer.js", line 2, in [anonymous]
      async render(selector) {
  File "[native code]", line unknown, in Promise
  File "webpack:///./app/javascript/user-icon-renderer.js", line 2, in [anonymous]
      async render(selector) {
  File "webpack:///./app/javascript/markdown-initializer.js", line 28, in undefined.replace
        new UserIconRenderer().render(selector)
  File "webpack:///./app/javascript/markdown.js", line 9, in [anonymous]
      new MarkdownInitializer().replace('.js-markdown-view')