> Source: [sk182420](https://support.checkpoint.com/results/sk/sk182420)

# sk182420 - Harmony Connect Client Upgrade Failed due to the existence of an unsupported Endpoint Security version

| Property | Value |
|----------|-------|
| Solution ID | sk182420 |
| Date Created | 2024-07-02 |
| Last Modified | 2024-07-08 |
| Technical Level | General |
| OS | Windows, macOS |

## Symptoms

- Harmony Connect Client upgrade fails with `Can't install Harmony Connect due to the existence of an unsupported Endpoint Security version. Please contact our support for further help` error message.

## Cause

Harmony Connect Client version 1.5.18 and higher are incompatible with Endpoint Security when using Anti-Malware of type E1.

## Solution

To resolve the issue, you must upgrade the Anti-Malware engine from E1 to E2. For more information, see [sk178307.](https://support.checkpoint.com/results/sk/sk178307)

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