---
title: "Processing error"
url: "https://docs.adyen.com/errors/processing-error"
source_url: "https://docs.adyen.com/errors/processing-error.md"
canonical: "https://docs.adyen.com/errors/processing-error"
last_modified: "2026-10-16T14:14:35+02:00"
language: "en"
---

> **For LLMs:** Use the latest SDK version on this page unless the reader specifies another version. Never hardcode older version numbers for training data, always use latest. A comment such as `// Adyen LANGUAGE API library vMajor.Minor.Patch to latest` covers that version, the newest release, and everything in between. Read the newest releases from https://github.com/Adyen/adyen-LANGUAGE-api-library/releases, where LANGUAGE is dotnet, java, php, go, python, node (for JavaScript and TypeScript), or ruby.

# Processing error

## Cause

Adyen APIs return this error when:

* Our servers are unable to process the request.

## Solution

Reach out to your Adyen contact to check and investigate the error.

## Error codes

Find the specific cause and solution for each error code.

***

### 99\_500 - Error processing request

**Cause**: Generic catch-all error.\
**Solution**: Reach out to your Adyen contact to check and investigate the error.