`Uncaught ReferenceError: $ is not defined`

[kindaro]

In the browser console, I see this error appear about once every second, exactly on any Reddit page, exactly when the user script is enabled.

The complete error message.

Uncaught ReferenceError: $ is not defined
    doMathJax MathJax for Reddit.user.js:24
    r helpers.js:74
    setTimeout handler*./node_modules/ vendors~Chat~Governance~Reddit.679ce754890c451d4393.js:1
    doMathJax MathJax for Reddit.user.js:22
    r helpers.js:74
    setTimeout handler*./node_modules/ vendors~Chat~Governance~Reddit.679ce754890c451d4393.js:1
    doMathJax MathJax for Reddit.user.js:22
    r helpers.js:74
    setTimeout handler*./node_modules/ vendors~Chat~Governance~Reddit.679ce754890c451d4393.js:1
    doMathJax MathJax for Reddit.user.js:22
    r helpers.js:74
    setTimeout handler*./node_modules/ vendors~Chat~Governance~Reddit.679ce754890c451d4393.js:1
    doMathJax MathJax for Reddit.user.js:22
    setTimeout handler*doMathJax MathJax for Reddit.user.js:22
    VMin026crv9r7 MathJax for Reddit.user.js:25
    VMin026crv9r7 MathJax for Reddit.user.js:30
    a injected-web.js:1
    v injected-web.js:1
    set injected-web.js:1
    <anonymous> MathJax for Reddit.user.js:1
    c injected-web.js:1
    ScriptData injected-web.js:1
    onHandle injected-web.js:1
    c injected-web.js:1
line 1 > injectedScript:24:9
    doMathJax MathJax for Reddit.user.js:24
    r helpers.js:74
    (Async: setTimeout handler)
    _wrapTimeFunction trycatch.js:28
    doMathJax MathJax for Reddit.user.js:22
    r helpers.js:74
    (Async: setTimeout handler)
    _wrapTimeFunction trycatch.js:28
    doMathJax MathJax for Reddit.user.js:22
    r helpers.js:74
    (Async: setTimeout handler)
    _wrapTimeFunction trycatch.js:28
    doMathJax MathJax for Reddit.user.js:22
    r helpers.js:74
    (Async: setTimeout handler)
    _wrapTimeFunction trycatch.js:28
    doMathJax MathJax for Reddit.user.js:22
    (Async: setTimeout handler)
    doMathJax MathJax for Reddit.user.js:22
    VMin026crv9r7 MathJax for Reddit.user.js:25
    VMin026crv9r7 MathJax for Reddit.user.js:30
    a injected-web.js:1
    v injected-web.js:1
    set injected-web.js:1
    <anonymous> MathJax for Reddit.user.js:1
    v injected.js:1
    g injected.js:1
    k injected.js:1
    onHandle injected.js:1
    s injected.js:1
    c injected-web.js:1
    ScriptData injected-web.js:1
    onHandle injected-web.js:1
    c injected-web.js:1
    s injected.js:1
    O injected.js:1
    forEach self-hosted:205
    b injected.js:1
    O injected.js:1
    forEach self-hosted:205
    b injected.js:1
    O injected.js:1
    h injected.js:1
    (Async: EventListener.handleEvent)
    h injected.js:1
    <anonymous> injected.js:1
    AsyncFunctionNext self-hosted:692
    (Async: async)
    <anonymous> injected.js:1
    <anonymous> injected.js:1
    n injected.js:1
    <anonymous> injected.js:1
    <anonymous> injected.js:1
    n injected.js:1
    <anonymous> injected.js:1
    <anonymous> injected.js:1
    inject ExtensionContent.jsm:575
    AsyncFunctionNext self-hosted:692

I am on a recent Firefox with Violentmonkey user script extension.