Troubleshooting 8 min read

Troubleshooting Common Issues

Quick solutions to common problems you might encounter while using Zaple and WhatsApp Business API.

Messages Not Delivering

Symptoms: Messages stuck in "Sent" status, not showing "Delivered"

Possible Causes & Solutions:

  • 1.
    Invalid phone number: Ensure the number is on WhatsApp. Send a test message to your own number first.
  • 2.
    User blocked you: If a user has blocked your number, messages won't deliver. Check your quality rating.
  • 3.
    Recipient's phone is off: Message will deliver when they come online.
  • 4.
    Rate limited: You've hit messaging limits. Wait or get verified for higher limits.

Template Rejected

Symptoms: Template shows "Rejected" status after submission

Common Rejection Reasons:

  • Misleading content: Template promises something you can't deliver
  • Prohibited content: Gambling, adult content, illegal activities
  • Wrong category: Marketing content submitted as Utility
  • Variable issues: Too many variables, variable at the start
  • Spelling/grammar: Poor language quality

Fix: Review Meta's template guidelines, fix the issues, and resubmit with a different template name.

"Outside 24-Hour Window" Error

Symptoms: Unable to send messages, error about 24-hour window

Solution:

The 24-hour customer service window has expired. You can only send free-form messages within 24 hours of the customer's last message.

To message again: You must use an approved template message to re-open the conversation.

WhatsApp Number Not Connecting

Symptoms: Connection fails during WhatsApp setup

Troubleshooting Steps:

  1. Ensure the number is NOT registered on WhatsApp or WhatsApp Business app
  2. If it is, delete the WhatsApp account first
  3. Verify you can receive SMS/calls on that number
  4. Check that Meta Business account has no restrictions
  5. Try a different browser or clear cache
  6. Disable any ad blockers

Quality Rating Dropped

Symptoms: Quality rating changed from green to yellow/red

Why This Happens:

  • Users reported your messages as spam
  • High block rate
  • Low engagement on messages
  • Sending to uninterested audiences

How to Recover:

  • Pause low-performing campaigns
  • Improve targeting and list quality
  • Make content more relevant and valuable
  • Reduce messaging frequency
  • Wait 7+ days while maintaining quality

Media Not Sending

Symptoms: Images, videos, or documents fail to send

Check These:

  • File size: Images max 5MB, Videos max 16MB, Documents max 100MB
  • Format: Supported formats only (JPG, PNG, MP4, PDF, etc.)
  • URL accessibility: If using URLs, ensure files are publicly accessible
  • Upload timeout: Try uploading smaller files or better connection

Contacts Not Importing

Symptoms: CSV import fails or skips contacts

Common Issues:

  • Phone format: Include country code, no spaces/dashes (e.g., 919876543210)
  • CSV encoding: Use UTF-8 encoding
  • Headers: First row must be column headers
  • Duplicate numbers: Duplicates are automatically skipped
  • File size: Split large files into smaller batches

Broadcast Stuck in "Pending"

Symptoms: Broadcast doesn't start sending

Possible Causes:

  • Template became inactive/rejected after broadcast creation
  • WhatsApp account disconnected
  • Messaging limits reached
  • Scheduled for a future time

Still Need Help?

If you couldn't find a solution to your issue: