I have been facing problems with the Gmail Sender in my workflow

[Nishkant]

It was working for the previous runs 10-15 runs but suddenly stopped working.

Flow link: https://www.gumloop.com/pipeline?workbook_id=o5zNowCqtT8u6PLi8HPJMF&tab=1&run_id=br23HQDBHbCyrpt4McxUxx

Error Shown:

[Gumloop_Bot]

Hey @Nishkant! If you’re reporting an issue with a flow or an error in a run, please include the run link and make sure it’s shareable so we can take a look.

1. Find your run link on the history page. Format: https://www.gumloop.com/pipeline?run_id={{your_run_id}}&workbook_id={{workbook_id}}

2. Make it shareable by clicking “Share” → ‘Anyone with the link can view’ in the top-left corner of the flow screen.
   

3. Provide details about the issue—more context helps us troubleshoot faster.

You can find your run history here: https://www.gumloop.com/history

[Wasay-Gumloop]

Hey @Nishkant – Certain HTML elements are not allowed in subject line input.

Here’s the problematic part of your header value:

'Based on the provided context from the URL,\n the article\'s title is "Zanshin: Learning the Art of Attention and Focus from\n a Legendary Samurai Archer."  \nOutput:  \n**Article for the Day:** Zanshin: Learning the Art of Attention and Focus from\n a Legendary Samurai Archer.'

Issues:

1. \n — Newline characters are not allowed in header values.
2. Colons : — While allowed in values, if improperly formatted, they may be misread as additional headers (e.g., Key: Value looks like a new header line).
3. Markdown (**Article for the Day:**) — not inherently a problem, but may compound issues if sent in headers without encoding.

Would recommend using plain text for the subject line.

[Nishkant]

It worked! Thanks for sharing this