---
title: "Application error when emailing an invoice"
slug: "resolve-application-error-when-emailing-an-invoice"
updated: 2026-07-24T18:16:28Z
published: 2026-07-24T18:16:28Z
canonical: "help.servicetitan.com/resolve-application-error-when-emailing-an-invoice"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.servicetitan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Application error when emailing an invoice

![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/anvil-wrench.png) Troubleshooting **Role:** Administrator · Bookkeeper · CSR · Office Admin**Area:** Accounting, Invoicing · All business types

## **What you're seeing**

When you try to email an invoice, an application error appears in ServiceTitan and the email doesn't send (the email dialog may fail to load).

## **Why this happens**

There are 3 common reasons. The first two are the most common.

**Reason 1**

**A corrupted file is attached to the job.** A corrupted file attached to the job blocks the email. This is the most common cause.

**Reason 2**

**The customer's delivery preference isn't set to email.** If the customer isn't set to receive invoices by email, the email can fail.

**Reason 3**

**A browser issue on your end.** A stale browser cache can cause the error. If clearing the cache doesn't help, a browser-specific problem may be blocking the email dialog from loading.

## **How to fix it**

Try each check in order until the invoice emails successfully.

### **1****Remove corrupted file attachments**

This is the most common cause: a corrupted file attached to the job blocks the email.

1. Go to the job associated with the invoice.
2. Click into the customer profile and open the **Attachments** section (bottom left). Look for any corrupted files.
3. If you find corrupted files, click the trash can icon to the right of the attachment to delete them.
4. Try to email the invoice again.

> [!NOTE]
> **✓ Done ·** With the corrupted attachment removed, the invoice emails successfully.

### **2****Confirm the customer's email delivery preference**

If the customer isn't set to receive invoices by email, the email can fail.

1. Go to the customer profile.
2. Click the edit icon next to their name.
3. Scroll to the **Invoice and Statement Delivery** section.
4. If it isn't already checked, check the box next to **Email**.
5. Click **Save**.
6. Try to email the invoice again.

> [!NOTE]
> **✓ Done ·** With email delivery enabled, the invoice emails successfully.

### **3****Clear your browser cache**

A stale browser cache can cause the error.

1. Clear your browser cache:
  - **Google Chrome:** Go to **Chrome > More > More tools > Clear browsing data**, then select the top four checkboxes. This won't delete your saved passwords.
  - **Safari (Mac):** Open Safari, go to **Safari > Preferences > Privacy**, click **Manage Website Data**, then select the sites to clear — or click **Remove All** to clear everything.
2. Log out of ServiceTitan and log back in.

> [!NOTE]
> **✓ Done ·** After clearing the cache and logging back in, the invoice emails successfully.

### **4****Try incognito or private browsing**

If clearing the cache didn't help, open a private window and try again.

1. Open a private browsing window:
  - **Google Chrome:** Click **More > New Incognito window**, or press **Ctrl + Shift + N**.
  - **Safari (Mac):** Go to **File > New Private Window**, or press **Shift + Command + N**.
2. Try to email the invoice again.

> [!NOTE]
> **✓ Done ·** The invoice emails successfully from the private window.

## **Still not working?**

If none of the checks work, the issue may be a temporary system incident. Check the [**ServiceTitan status page**](/docs/resolve-application-error-when-emailing-an-invoice#) **[VERIFY — add URL]**, then contact ServiceTitan Technical Support at [**go.servicetitan.com/ask**](https://go.servicetitan.com/ask) with:

- The invoice number and the customer name
- The exact error message, and whether the email dialog loads at all
- Which checks you've already tried
- Whether other invoices email successfully (or it's just this one)

## **Want to learn more?**

[**Print, email, and download customer invoices ›**](https://help.servicetitan.com/docs/print-email-and-download-customer-invoices) How to send customer invoices by print, email, or download.

[**Can't select invoices to email in a batch ›**](https://help.servicetitan.com/docs/unable-to-select-multiple-invoices-to-email-in-a-batch) What to do when invoices can't be selected for batch emailing.