要解决“Angular 6+无法在ngx-monaco-editor上运行”的问题，您可以尝试以下步骤：

1. 确保已正确安装ngx-monaco-editor和monaco-editor库。可以通过运行以下命令来安装ngx-monaco-editor：

npm install ngx-monaco-editor monaco-editor

2. 在你的Angular项目的tsconfig.json文件中，确保以下配置已启用：

{
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true
  }
}

3. 确保在你的Angular项目的polyfills.ts文件中已导入monaco-editor的相关样式和脚本。在polyfills.ts文件中添加以下代码：

import 'monaco-editor/esm/vs/editor/browser/controller/coreCommands.js';
import 'monaco-editor/esm/vs/editor/browser/widget/codeEditorWidget.js';
import 'monaco-editor/esm/vs/editor/browser/widget/diffEditorWidget.js';
import 'monaco-editor/esm/vs/editor/browser/widget/diffNavigator.js';
import 'monaco-editor/esm/vs/editor/contrib/accessibility/accessibility.js';
import 'monaco-editor/esm/vs/editor/contrib/anchorSelect/anchorSelect.js';
import 'monaco-editor/esm/vs/editor/contrib/bracketMatching/bracketMatching.js';
import 'monaco-editor/esm/vs/editor/contrib/caretOperations/caretOperations.js';
import 'monaco-editor/esm/vs/editor/contrib/caretOperations/transpose.js';
import 'monaco-editor/esm/vs/editor/contrib/clipboard/clipboard.js';
import 'monaco-editor/esm/vs/editor/contrib/codeAction/codeActionContributions.js';
import 'monaco-editor/esm/vs/editor/contrib/comment/comment.js';
import 'monaco-editor/esm/vs/editor/contrib/contextmenu/contextmenu.js';
import 'monaco-editor/esm/vs/editor/contrib/cursorUndo/cursorUndo.js';
import 'monaco-editor/esm/vs/editor/contrib/dnd/dnd.js';
import 'monaco-editor/esm/vs/editor/contrib/documentSymbols/documentSymbols.js';
import 'monaco-editor/esm/vs/editor/contrib/emptySelectionClipboard/emptySelectionClipboard.js';
import 'monaco-editor/esm/vs/editor/contrib/folding/folding.js';
import 'monaco-editor/esm/vs/editor/contrib/fontZoom/fontZoom.js';
import 'monaco-editor/esm/vs/editor/contrib/format/formatActions.js';
import 'monaco-editor/esm/vs/editor/contrib/gotoError/gotoError.js';
import 'monaco-editor/esm/vs/editor/contrib/gotoSymbol/goToCommands.js';
import 'monaco-editor/esm/vs/editor/contrib/gotoSymbol/link/goToDefinitionAtPosition.js';
import 'monaco-editor/esm/vs/editor/contrib/hover/hover.js';
import 'monaco-editor/esm/vs/editor/contrib/inPlaceReplace/inPlaceReplace.js';
import 'monaco-editor/esm/vs/editor/contrib/indentation/indentation.js';
import 'monaco-editor/esm/vs/editor/contrib/inlineHints/inlineHintsController.js';
import 'monaco-editor/esm/vs/editor/contrib/linesOperations/linesOperations.js';
import 'monaco-editor/esm/vs/editor/contrib/linkedEditing/linkedEditing.js';
import 'monaco-editor/esm/vs/editor/contrib/links/links.js';
import 'monaco-editor/esm/vs/editor/contrib/multicursor/multicursor.js';
import 'monaco-editor/esm/vs/editor/contrib/parameterHints/parameterHints.js';
import 'monaco-editor/esm/vs/editor/contrib/quickFix/quickFixCommands.js';
import 'monaco-editor/esm/vs/editor/contrib/rename/onTypeRename.js';
import 'monaco-editor/esm/vs/editor/contrib/smartSelect/smartSelect.js';
import 'monaco-editor/esm/vs/editor/contrib/snippet/snippetController2.js';
import 'monaco-editor/esm/vs/editor/contrib/suggest/suggestController.js';
import 'monaco-editor/esm/vs/editor/contrib/toggleTabFocusMode/toggleTabFocusMode.js';
import 'monaco-editor/esm/vs/editor/contrib/unusualLineTerminators/unusualLineTerminators.js';
import 'monaco-editor/esm/vs/editor/contrib/viewportSemanticTokens/viewportSemanticTokens.js';
import 'monaco-editor/esm/vs/editor/contrib/wordHighlighter/wordHighlighter.js';
import 'monaco-editor/esm/vs/editor/contrib/wordOperations/