[Bug] Nil assertion failed (NilAssertionError)

[Aiclys]

I tried clicking on the following video: https://yt.cdaut.de/watch?v=mZDinQ92OZQ. The title is "Young Thug, Travis Scott - Pick Up the Phone (Explicit) ft. Quavo". It didn't work and the following error message showed up:

Title: `Nil assertion failed (NilAssertionError)`
Date: `2024-03-03T18:46:22Z`
Route: `/watch?v=mZDinQ92OZQ`
Version: `2024.02.19-e8a3698 @ master`

<details>
<summary>Backtrace</summary>
<p>
   

Nil assertion failed (NilAssertionError)
  from /usr/share/crystal/src/nil.cr:113:7 in 'not_nil!'
  from /usr/share/crystal/src/nil.cr:109:3 in 'not_nil!'
  from src/invidious/helpers/signatures.cr:14:11 in 'fetch_decrypt_function'
  from src/invidious/helpers/signatures.cr:62:9 in 'decrypt_signature'
  from /usr/share/crystal/src/string.cr:5510:5 in 'fmt_stream'
  from src/invidious/routes/watch.cr:120:18 in 'handle'
  from lib/kemal/src/kemal/route.cr:13:9 in '->'
  from src/invidious/helpers/handlers.cr:30:37 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call_next'
  from lib/kemal/src/kemal/filter_handler.cr:21:7 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call_next'
  from src/invidious/helpers/handlers.cr:94:12 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call_next'
  from src/ext/kemal_static_file_handler.cr:106:14 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /usr/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /usr/share/crystal/src/http/server/request_processor.cr:51:11 in 'handle_client'
  from /usr/share/crystal/src/fiber.cr:146:11 in 'run'
  from ???

</p>
</details>

Steps to Reproduce

1. Search for 'pick up the phone'
2. Click on 'Young Thug, Travis Scott - Pick Up the Phone (Explicit) ft. Quavo'
3. Scroll down to '....'
4. See error

Additional context

• Browser : Mullvad Browser (latest version)
• OS: Arch Linux
• Invidious instances tested: https://iv.melmac.space and https://yt.cdaut.de

[github-actions]

Hello, your issue is a duplicate of this/these issue(s):

• [Bug] Nil assertion failed (NilAssertionError) - data_control #4449 [accuracy: 100%]

If this is a mistake please explain why and ping @\unixfox, @\SamantazFox and @\TheFrenchGhosty.

Please refrain from opening new issues, it won't help in solving your problem.