Error on https://uploads.ungrounded.net/ruffle_wrapper/ruffleembed.html

[Kewlan]

Error Info

Error name: Error
Error message: panicked at 'called Option::unwrap() on a None value', core/src/display_object/container.rs:945:18
Error stack:

Error: panicked at 'called `Option::unwrap()` on a `None` value', core/src/display_object/container.rs:945:18
    at a.wbg.__wbg_new_df6e6ab7a65c4c4d (https://uploads.ungrounded.net/ruffle_wrapper/lib/ruffle.js?1616425469:1:6553)
    at std::sync::once::Once::call_once::{{closure}}::hce6501f6f20767e4 (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[1470]:0x2c47ba)
    at std::sync::once::Once::call_inner::hd3d269a4946f2df2 (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[1760]:0x2fa94f)
    at core::ops::function::FnOnce::call_once{{vtable.shim}}::h6ed7686ed76cb258 (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[5222]:0x404b8b)
    at std::panicking::rust_panic_with_hook::h4f753dc70b771d8e (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[4007]:0x3d664d)
    at std::panicking::begin_panic_handler::{{closure}}::h5c9fc29957309ae8 (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[4717]:0x3f7a6b)
    at std::sys_common::backtrace::__rust_end_short_backtrace::h92808941d97e9b21 (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[5590]:0x40a7e9)
    at rust_begin_unwind (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[5465]:0x408ec7)
    at core::panicking::panic_fmt::hbd8a975261a5f466 (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[5591]:0x40a81f)
    at core::panicking::panic::h8e74859c8f9988ca (https://uploads.ungrounded.net/ruffle_wrapper/lib/dd280c8a7aa464beeccc78df18fd16df.wasm:wasm-function[5394]:0x407c90)

Player Info

Allows script access: false

Page Info

Page URL: https://uploads.ungrounded.net/ruffle_wrapper/ruffleembed.html?v=1.0.64&browsermode=default&props=%7B%22ruffle%22%3A%22%2Fruffle_wrapper%2Flib%2Fruffle.js%3F1616425469%22%2C%22public_path%22%3A%22%2Fruffle_wrapper%2Flib%2F%22%2C%22swf%22%3A%22https%3A%2F%2Fuploads.ungrounded.net%2F526000%2F526470_beastgame_ng.swf%3F1381183836%22%2C%22vars%22%3A%7B%22NewgroundsAPI_PublisherID%22%3A1%2C%22NewgroundsAPI_SandboxID%22%3A%22605a4bfcaa321%22%2C%22NewgroundsAPI_SessionID%22%3A%22%22%2C%22NewgroundsAPI_UserName%22%3A%22%26lt%3Bdeleted%26gt%3B%22%2C%22NewgroundsAPI_UserID%22%3A0%2C%22ng_username%22%3A%22%26lt%3Bdeleted%26gt%3B%22%7D%2C%22width%22%3A640%2C%22height%22%3A480%2C%22icon%22%3A%22https%3A%2F%2Fpicon.ngfiles.com%2F526000%2Fflash_526470_card.png%3Ff1610478129%22%7D
SWF URL: https://uploads.ungrounded.net/526000/526470_beastgame_ng.swf?1381183836

Browser Info

Useragent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36
OS: Win32

Ruffle Info

Version: 0.1.0
Name: nightly 2021-03-22
Channel: nightly
Built: 2021-03-22T00:19:43.563Z
Commit: 760e842

[Bale001]

when did the error happen?

[Kewlan]

When I entered the door that unlocks after beating the three tower bosses.

[Poopooracoocoo]

Link to Chibi Knight on Newgrounds:
https://www.newgrounds.com/portal/view/526470