Prerequisites

• I have searched existing issues and discussions to ensure this bug hasn't been reported before
• I have read the troubleshooting section in the README
• I have tested this issue with yt-dlp directly (not just through MeTube UI) as described in the README
• I have checked that this is not a yt-dlp issue (if it is, please report it to yt-dlp repository instead)

Bug Description

I downloaded 8 videos simultaneously and only 4 correctly downloaded, after retrying, i got this error:

Error adding URL: 500 internal server error

Server got itself in trouble

yt-dlp Direct Test Results

it worked fine

Environment & Configuration

latest metube (app interface says 2025.10.15)
latest YT-DLP (app interface says 2025.10.14)
running in ubuntu server in docker from a compose

Additional Context

console outputs:

Failed to load resource: the server responded with a status of 500 (Internal Server Error)