Didn't work on old Macbook Pro

Figure out why my demo bombed and fix it.

Uncaught TypeError: Cannot read properties of undefined (reading 'core')
    at __wbg_invoke_788de886402df539 (skinnable-tauri-demo-ui-15512daf01d4f639.js:205:42)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.skinnable_tauri_demo_ui::app::invoke::{{closure}}::__wbg_invoke_788de886402df539::h8ab719b00774ccbc externref shim (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x6d5afa)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.skinnable_tauri_demo_ui::app::invoke::{{closure}}::hdf0340dad4f06eab (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x3e9b03)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.<skinnable_tauri_demo_ui::app::App as yew::functional::FunctionProvider>::run::app::{{closure}}::{{closure}}::hdae74bef2a0dd629 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x38c8dd)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.js_sys::futures::task::singlethread::Inner::is_ready::hd6b650832e80622a (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x5afe03)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.js_sys::futures::task::singlethread::Task::run::{{closure}}::h6564a54c0662defb (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x69744b)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.wasm_bindgen::convert::closures::_::invoke::{{closure}}::h22c7fcb9ee916344 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x689e02)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.core::ops::function::FnOnce::call_once::h8d9faebd747e4350 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x685505)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.<core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<(:1420/)>>::call_once::h5054edd3a4b53ea5 (http://localhost:1420/skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.wasm_bindgen::__rt::maybe_catch_unwind::hb39bfad94755b4b1 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x689d94)
2skinnable-tauri-demo-ui-15512daf01d4f639.js:45 Uncaught TypeError: arg0.bytes is not a function
    at __wbg_bytes_494b745377ba7660 (skinnable-tauri-demo-ui-15512daf01d4f639.js:45:30)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.web_sys::features::gen_Blob::Blob::bytes::__wbg_bytes_494b745377ba7660::h588d747b3add3cdf externref shim (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x6db362)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.web_sys::features::gen_Blob::Blob::bytes::h218b31b1a7bba0f9 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x607f73)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.skinnable_tauri_demo_ui::app::skinner::Skinner::apply::{{closure}}::ha04cbc3bcd1c7812 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x2980a5)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.<skinnable_tauri_demo_ui::app::skinner::Skinner as yew::html::component::Component>::update::{{closure}}::ha7a4e844ad6bb67f (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x49d348)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.js_sys::futures::task::singlethread::Inner::is_ready::hd6b650832e80622a (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x5afe03)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.js_sys::futures::task::singlethread::Task::run::{{closure}}::h6564a54c0662defb (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x69744b)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.wasm_bindgen::convert::closures::_::invoke::{{closure}}::h22c7fcb9ee916344 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x689e02)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.core::ops::function::FnOnce::call_once::h8d9faebd747e4350 (skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm:0x685505)
    at skinnable_tauri_demo_ui-86328194292ae44d.wasm.<core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<(:1420/)>>::call_once::h5054edd3a4b53ea5 (http://localhost:1420/skinnable-tauri-demo-ui-15512daf01d4f639_bg.wasm)