> Source: [sk137353](https://support.checkpoint.com/results/sk/sk137353)

# sk137353 - SandBlast Agent browser extension (SBA4B) - common issues

| Property | Value |
|----------|-------|
| Solution ID | sk137353 |
| Date Created | 2018-09-30 |
| Last Modified | 2022-09-04 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |
| OS | Windows |

## Symptoms

- * Error: "Could not contact server (insecure response)."
* Error: "Server returned an unexpected response(Forbidden), or API key is invalid, please check your subscription"
* Error: "Server did not reply in a timely manner"
* Error: "Could not contact server (tunnel connection failed)"
* Error: "Fail to download file. Please try again but only if you trust this site"
* Error: "Failed to inspect file"
* Error: "Failed to upload file for inspection"

## Solution

This solution requires authentication. Please log in to view the full solution.

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# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
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- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content