The endpoint agent provides error codes and messages for connection and installation issues.
You see these error codes and messages in the EndpointAgent.txt log file located here:
- %ProgramData%\Malwarebytes Endpoint Agent\Logs\EndpointAgent.txt
Endpoint agent connection errors
This table details connection errors seen by the endpoint agent when connecting with Nebula.
| Error | Reason | Resolution |
| 400 | Occurs when the endpoint agent receives a bad connection request. |
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| 403 | Occurs when the connection request is denied access. |
Verify you have administrative permissions to your firewall. |
| 502 | Occurs when the endpoint receives a bad gateway connection. | Retry the connection later. |
| 504 | Occurs when the endpoint receives a timed out gateway connection. | Retry the connection later. |
| 14001 | Occurs when the MBCloudEA.exe.config file becomes corrupted. | Use the Configuration Recovery Tool. For more information, see Error 14001: The application has failed to start because its side-by-side configuration is incorrect. |
| SSL_Protocol_Error | Occurs when navigating to websites blocked by Malwarebytes. | Clear the cache in Google Chrome. For more information, see SSL Protocol Error in Google Chrome with Nebula. |
Endpoint agent installation errors
This table details connection errors seen by the endpoint agent during installation.
| Error/Message | Reason | Resolution |
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MBSETUP_ERROR_UNSUPPORTED_OS (200) Malwarebytes for Windows does not support this system's CPU or hardware architecture. |
Advanced RISC Machines (ARM) processors are not supported. |
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Your system does not have enough free disk space to install Malwarebytes.
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There isn't enough free disk space on the endpoint to install the endpoint agent. |
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| MBSETUP_ERROR_PREREQUISITE_NOT_MET (204) | A Windows update is required to install Malwarebytes. |
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| 0x80070643 - Fatal error during installation |
Failure remove a previous Malwarebytes product. |
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| Error Setup ended prematurely when installing the endpoint agent. |
Installation failed due to environmental requirements or remnants of a previous installation. |
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| Error: installation success or error status: 1603 |
Installation failed due to environmental requirements. |
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Error 14001: The application has failed to start because its side-by-side configuration is incorrect. |
The MBCloudEA.exe.config may be corrupted. |
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