While nothing showed up in Red after pressing Crtl+Shift+I, there was a red x (which must be what you were referring to). Clicking on that opened this, which gave me…
Uncaught TypeError: The “path” argument must be of type string. Received undefined
at __node_internal_captureLargerStackTrace (node:internal/errors:463)
at new NodeError (node:internal/errors:370)
at validateString (node:internal/validators:119)
at Object.join (node:path:429)
at mod.js:603
DevTools failed to load source map: Could not load content for https://unpkg.com/@popperjs/popper.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for https://unpkg.com/tippy-bundle.umd.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE