Calling another workflow: Prompt not specified, expected 'chatInput'

I'm encountering an error when attempting to call another workflow. The issue arises when the output from my first AI Agent is intended to be used as the prompt for the input of my first node. The error message is:

Error:

No prompt specified

Expected to find the prompt in an input field named ‘chatInput’ (this is what the chat trigger node outputs). To use a different field, please adjust the ‘Prompt’ parameter.

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Here is the prompt for the first AI Agent:

json
{
"name": "Scraper Workflow Selector",
"node_configuration": {
"input_field": "chatInput",
"output_format": "string",
"prompt_template": "You are a workflow selector assistant. Your job is to:n1. Determine if we should use LinkedIn Scraper or Ultimate Scraper based on the user’s requestn2. Format a proper search request for the chosen scrapernnRules for selection:n- Use LinkedIn Scraper if: the request involves finding people, professionals, or specifically mentions LinkedInn- Use Ultimate Scraper if: the request involves scraping any other website or datannBased on the following user request, select the appropriate scraper and format the search parameters:nn{{chatInput}}nnRespond in the following JSON format only:n{n "selected_scraper": "linkedin_scraper" or "ultimate_scraper",n "search_parameters": {n "target_url": "website URL",n "keywords": ["keyword1", "keyword2"]n }n}"
},
"examples": [
{
"input": "Find software engineers at Google",
"output": {
"selected_scraper": "linkedin_scraper",
"search_parameters": {
"target_url": "<a href="https://www.linkedin.com" rel="noopener nofollow ugc"> https://www.linkedin.com</a> ;",
"keywords": ["software engineer", "Google"]
}
}
},
{
"input": "Scrape product prices from <a href="http://Amazon.com" rel="noopener nofollow ugc">Amazon.com</a>",
"output": {
"selected_scraper": "ultimate_scraper",
"search_parameters": {
"target_url": "<a href="https://www.amazon.com" rel="noopener nofollow ugc"> https://www.amazon.com</a> ;",
"keywords": ["price"]
}
}
}
]
}


What steps can I take to resolve this?