# OnlyMonster Browser Troubleshooting Guide
## OnlyMonster Browser won't run
#### 1. Reboot Your Computer
Rebooting your computer periodically helps applications run faster and more smoothly. If the browser doesn’t launch, **reboot your PC** and try again.
#### 2. Check Your Operating System
OnlyMonster Browser is optimized for **Windows 10** and **macOS 11.0** or later. If you're using an older version, please update your operating system to the required version.
#### 3. Check for Antivirus or Firewall Interference
Antivirus or firewall software may block the browser for the following reasons:
**— Blocking executable files**: Some antivirus programs mistakenly flag the browser as unsafe and block it.
#### To resolve this:
**— Disable your antivirus and firewalls**: Temporarily turn off your antivirus and firewall to check if they’re causing the issue. For Windows users, ensure that **Windows Defender Antivirus** and **Windows Firewall** are also disabled. Follow these steps:
#### How to Disable Windows Defender Antivirus:
* Open the **Start Menu** and search for **Windows Security**.
* Click on **Virus & Threat Protection**.
* Under **Virus & Threat Protection Settings**, click **Manage Settings**.
* Toggle off **Real-time protection** to temporarily disable Windows Defender.
#### How to Disable Windows Firewall:
* Open the **Start Menu** and search for **Windows Defender Firewall**.
* Click on **Turn Windows Defender Firewall on or off** in the left panel.
* Select **Turn off Windows Defender Firewall** for both **Private** and **Public** network settings.
After disabling the antivirus and firewall, try launching OnlyMonster Browser again.
## Other Common Errors
### Type 1: Sidebar Loaded, but OnlyFans Profiles Not Displaying
If the sidebar loads but OnlyFans profiles do not display and the OnlyMonster loader keeps freezing:
* **Disable OnlyFans Proxy Bypass**:\
Go to **OnlyMonsterAI > Settings > Disable OnlyFans Proxy Bypass**.\
(On Windows OS, right-click the monster icon to find the settings.)
### Type 2: “Cannot access vital resources through the internet” & “Update Check Failed”
This error indicates that the browser cannot reach required resources because the connection is **unstable** or **restricted**.
To fix this:
* Check your internet connection.
* Try using a VPN.
* Disable antivirus, firewalls and ad blockers.
* Restart the OnlyMonster Browser.
### Type 3: “403 Access Error”
This is a **403 access error**, meaning the application cannot access required data.
To resolve the issue:
* Check that your account is **a member of the organization**.
* Make sure your account has an **active subscription**.
* Update your role in **Members → Edit → Update**.
### Type 4: Proxy Issues
If there is an error related to proxies, you need to change the proxy settings:
1. Navigate to the Account's tab.
2. Open **Settings**.
3. In the Proxy Settings panel, click **Switch IP** or change the proxy to another country.
4. Restart the browser.
For more information on Proxy settings, please refer to the [Proxy Management ](https://docs.onlymonster.ai/onlymonster-browser/proxy-management)article.
#### Still Having Issues?
If the problem persists, please contact our **technical support team** for further assistance.
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