Mermaid does no longer render correctly in collectives

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The Basics

  • Nextcloud Server version (e.g., 29.x.x):
    • 31.0.8
  • Operating system and version (e.g., Ubuntu 24.04):
    • Unknown (using Hetzners NextCloud offering)
  • Web server and version (e.g, Apache 2.4.25):
    • None except what is included in 31.0.8)
  • Reverse proxy and version _(e.g. nginx 1.27.2)
    • None except what is included in 31.0.8)
  • PHP version (e.g, 8.3):
    • replace me
  • Is this the first time you’ve seen this error? (Yes / No):
    • yes
  • When did this problem seem to first start?
    • After ugrade to 31.0.8
  • Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
    • Unknown - using Hetzners std. offering
  • Are you using CloudfIare, mod_security, or similar? (Yes / No)
    • no

Summary of the issue you are facing:

When inserting a mermaid snippet like this:

flowchart TB
  FromLeads["(A) Fetch mail from this tennent<br>This is the task manager"] --> 
  GetTennentInfo["(B) Get Tennent Info<br> Get List of mailboxes"]
  
  GetTennentInfo -->|Do maibox N| MailboxN["(C)Fetch Mailboxinfonr<br>Fetch no of mails"]
  MailboxN --> |Do this list of mail ie. 1-100| GetMailsN["(D) Get mails"]

The chart renders like: this

image
image1440×1130 25 KB

Steps to replicate it (hint: details matter!):

  1. Insert the Mermaid snippet above in a collectives document

  2. Click done and watch the render

Log entries

Nextcloud

Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.

I do not have access to the logs - this is a Hetzner std offering

Tips for increasing the likelihood of a response

  • Use the preformatted text formatting option in the editor for all log entries and configuration output.
  • If screenshots are useful, feel free to include them.
    • If possible, also include key error output in text form so it can be searched for.
  • Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.