PNG generation error - 502

[eduardjbotha]

Description

We've been using the mermaid PNG generation with langgraph, which calls the https://mermaid.ink/img/...?type=png in the background. This functionality seems to be broken when generating a PNG, but works for JPEG

Steps to reproduce

The difference between these two links is only the type query parameter.

• This JPEG link works
• This PNG link returns a 502

Setup

• Mermaid version: https://mermaid.ink on 24 September 2025
• Browser and Version: Edge v140.0.3485.81; python requests v2.32.5