Cannot set properties of undefined (setting 'triple-quoted-string') TypeError: Cannot set properties of undefined

[tikolakin]

Describe the bug
The latest version introduced a regression bug with prism. The 2.1.2 doesn't have this issue

Additional context
Cannot set properties of undefined (setting 'triple-quoted-string') TypeError: Cannot set properties of undefined (setting 'triple-quoted-string') at Object.extend (webpack-internal:///./node_modules/prismjs/prism.js:345:16) at eval (webpack-internal:///./node_modules/prismjs/components/prism-scala.js:1:41) at ./node_modules/prismjs/components/prism-scala.js ([https://localhost:3000/vendors-node_modules_mui_icons-material_Add_js-node_modules_mui_icons-material_Done_js-node_m-72c075.bundle.js:2299:1](vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)) at webpack_require ([https://localhost:3000/main.bundle.js:5618:33](vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)) at fn ([https://localhost:3000/main.bundle.js:5911:21](vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/code/electron-sandbox/workbench/workbench.html)) at eval (webpack-internal:///./node_modules/redoc/bundles/redoc.browser.lib.js:41:13084) at eval (webpack-internal:///./node_modules/redoc/bundles/redoc.browser.lib.js:1819:3806) at eval (webpack-internal:///./node_modules/redoc/bundles/redoc.browser.lib.js:1819:3811) at eval (webpack-internal:///./node_modules/redoc/bundles/redoc.browser.lib.js:2:37) at eval (webpack-internal:///./node_modules/redoc/bundles/redoc.browser.lib.js:2:43)

The error is introduced in https://github.com/Redocly/redoc/releases/tag/v2.1.3 intentionally in 4fc6aa0

[saul-data]

I have experienced the same:

Uncaught (in promise) TypeError: Cannot set properties of undefined (setting 'triple-quoted-string')
    at Object.extend (prism.js:345:16)
    at eval (prism-scala.js:1:41)
    at ./node_modules/prismjs/components/prism-scala.js (vendors-node_modules_docusaurus-theme-redoc_dist-jsx_theme_ApiDoc_index_js.js:2105:1)
    at __webpack_require__ (runtime~main.js:34:32)
    at fn (runtime~main.js:334:21)
    at eval (redoc.browser.lib.js:41:12173)
    at eval (redoc.browser.lib.js:1819:3806)
    at eval (redoc.browser.lib.js:1819:3811)
    at eval (redoc.browser.lib.js:2:37)
    at eval (redoc.browser.lib.js:2:43)

[saul-data]

I managed to fix this by adding in scala as an additional language

      prism: {
        theme: prismThemes.github,
        darkTheme: prismThemes.dracula,
        additionalLanguages: ["bash", "csharp", "java", "php", "ruby", "scala"],
      },