mermaid.live - export svg - svg image error

[mmattel]

Describe the bug
When you render an image on mermaid.live and export the image to svg,

the image exported contains an error: Namespace prefix xlink for href on a is not defined

This is because of: https://stackoverflow.com/questions/59138117/svg-namespace-prefix-xlink-for-href-on-image-is-not-defined

Note that this does not happen when you click

and do right click - download image on the new tab

To Reproduce
Create an image with:

sequenceDiagram
    participant Client
    participant Graph
    participant SpaceA
    participant SpaceB
    links Client: {"web": "https://owncloud.dev/clients/web/", "RClone": "https://owncloud.dev/clients/rclone/"}
    link Graph: Documentation @ https://owncloud.dev/extensions/graph/

    Note left of Client:  First, a clients looks<br/>up the spaces a user has access to
    opt space lookup
        Client->>+Graph: GET /me/drives
        Graph-->>-Client: 200 OK JSON list of spaces, say A, B and C,<br/> each with a dedicated webDavURL, etag and quota
    end

    Note left of Client: Then it can do a parallel<br/>sync discovery on spaces<br/>whose etag changed
    par Client to Space A
        Client->>+SpaceA: PROPFIND {webDavURL for Space A}
        SpaceA-->>-Client: 207 Multistatus PROPFIND response
    and Client to Space B
        Client->>+SpaceB: PROPFIND {webDavURL for space B}
        SpaceB-->>-Client: 207 Multistatus PROPFIND response
    end

and export it to SVG.
Then try to open the SVG with a browser.

Expected behavior
No error output

Screenshots

Desktop (please complete the following information):

• OS: Win64 / Ubuntu 20.04
• Browser: Opera / Chrome
• Version: latest

Fix Proposal
When changing the following manually in the svg image exported, all is fine and free of errors:
xmlns="http://www.w3.org/2000/svg" -->
xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"

@sidharthv96 FYI (hopefully you can fix this)

[sidharthv96]

@mmattel, I've fixed the issue using a workaround in live editor.
The actual fix needs to go in mermaid. I've raised mermaid-js/mermaid#3184 for that.