illegal base64 data at input byte 57

[flashlab]

Version running
RPC v3.2.3
yt-dlp v2024.12.12.232950

Describe the bug
While clicking 'download' 'view' on HOME or clicking item on ARCHIVE, I only see the message illegal base64 data at input byte 57

To Reproduce
Steps to reproduce the behavior:

1. download https://www.bilibili.com/video/BV1Bb4y1t7Xj/ with -x(audio only)
2. After complete, click the resource
3. See error

Expected behavior
Download audio or playing directly.

Screenshots

Additional context
The url of error page is like https://yt-dlp-web.domain.com/archive/v/L2hvbWUvdWJ1bnR1L011bHRpbWVkaWEv44CQQW5pbWVueuOAkeS6uueUn%2BeahOaXi%2Bi9rOacqOmprCAtIOWTiOWwlOeahOenu%2BWKqO.........?token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHBpc.......
The media name is 【Animenz】人生的旋转木马 - 哈尔的移动城堡 钢琴改编.m4a.
May be it's an issue of file name? There're Chinese characters and space within it.