Website doesn't handle "Library with id X not found" error properly

[crqch]

First issue is that /anything gets auto redirected to /anything/latest, so it looks like it's going to work.

Then, a white screen appears with a bunch of errors in the console.

Error: Library with id "404" not found!
    Nt https://tanstack.com/assets/main--VviXENm.js:71
    Title https://tanstack.com/assets/main--VviXENm.js:183
    T3 https://tanstack.com/assets/main--VviXENm.js:49
    U3 https://tanstack.com/assets/main--VviXENm.js:49
    TT https://tanstack.com/assets/main--VviXENm.js:49
    iE https://tanstack.com/assets/main--VviXENm.js:49
    eK https://tanstack.com/assets/main--VviXENm.js:49
    kw https://tanstack.com/assets/main--VviXENm.js:49
    JT https://tanstack.com/assets/main--VviXENm.js:49
    dE https://tanstack.com/assets/main--VviXENm.js:49
    L https://tanstack.com/assets/main--VviXENm.js:26
    JK https://tanstack.com/assets/main--VviXENm.js:26
    JK https://tanstack.com/assets/main--VviXENm.js:26
    eJ https://tanstack.com/assets/main--VviXENm.js:26
    rJ https://tanstack.com/assets/main--VviXENm.js:42
    nJ https://tanstack.com/assets/main--VviXENm.js:50
    <anonymous> https://tanstack.com/assets/main--VviXENm.js:50

DOMException: Node.appendChild: Cannot have more than one Element child of a Document
    ow https://tanstack.com/assets/main--VviXENm.js:49
    ow https://tanstack.com/assets/main--VviXENm.js:49
    Bi https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    Ii https://tanstack.com/assets/main--VviXENm.js:49
    zT https://tanstack.com/assets/main--VviXENm.js:49
    nK https://tanstack.com/assets/main--VviXENm.js:49
    oE https://tanstack.com/assets/main--VviXENm.js:49
    eE https://tanstack.com/assets/main--VviXENm.js:49
    JT https://tanstack.com/assets/main--VviXENm.js:49
    dE https://tanstack.com/assets/main--VviXENm.js:49
    L https://tanstack.com/assets/main--VviXENm.js:26
    JK https://tanstack.com/assets/main--VviXENm.js:26
    JK https://tanstack.com/assets/main--VviXENm.js:26
    eJ https://tanstack.com/assets/main--VviXENm.js:26
    rJ https://tanstack.com/assets/main--VviXENm.js:42
    nJ https://tanstack.com/assets/main--VviXENm.js:50
    <anonymous> https://tanstack.com/assets/main--VviXENm.js:50

Visit https://tanstack.com/anything/latest for reproduction