How to Fix the INVALID_PROPERTY_VALUE Error: Expected property 'condition' to contain at least one operand

When building flows with conditional logic in WhatsApp Flow Builder, it’s easy to overlook the condition field in the If component. But even a minor mistake, like leaving it blank or inserting just a space, triggers this error:

INVALID_PROPERTY_VALUE
Expected property 'condition' to contain at least one operand.

This error means Flow Builder was expecting a valid expression to evaluate (like a boolean check), but got nothing instead.

Quick Fix

Always provide a valid boolean expression in the "condition" field of an If component. An empty string, space, or null will break the flow. Replace

"condition": " "

with something meaningful like:

"condition": "${data.isUserActive}"

Why This Happens

The If component expects a "condition" field that resolves to true or false. An empty string (" ") is not a valid boolean expression, so the engine has nothing to evaluate.

Common Causes:

• A copied placeholder left unchanged
  

• Using " " instead of "${someCondition}"

• Forgetting to bind data using ${}

How to Fix It

Update your condition with a valid expression or boolean flag from your data object. For example:

{
  "type": "If",
  "condition": "${data.hasAccess}",
  "then": [
    {
      "type": "Text",
      "text": "You have access"
    }
  ],
  "else": [
    {
      "type": "Text",
      "text": "Access denied"
    }
  ]
}

Best Practice

Always ensure your condition is:

• Not empty
  

• A valid expression

• Properly referencing existing data

​For more troubleshooting insights related to WhatsApp Business API, check out heltar.com/blogs.