| Description | This article describes how to handle an issue where a configuration with a custom OS option results in a 'Failed to save rule set' error. |
| Scope | FortiSASE v24.3.59. |
| Solution |
Example of custom OS configuration as below:
The system rejected the operation with the error 'Failed to save rule set'.
The system will only allow an option from the list or based on the available OS version string. The custom OS version string is not supported.
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