octobercms/october · error · ValidationException

The File Name field is required.

Error message

The File Name field is required.

What it means

Error "The File Name field is required." thrown in octobercms/october.

Source

Thrown at modules/cms/classes/Asset.php:398

                ));
            }
        }
    }

    /**
     * validateFileName supplied with extension and path.
     * @param string $fileName
     */
    protected function validateFileName($fileName = null)
    {
        if ($fileName === null) {
            $fileName = $this->fileName;
        }

        $fileName = trim($fileName);

        if (!strlen($fileName)) {
            throw new ValidationException(['fileName' =>
                Lang::get('cms::lang.cms_object.file_name_required', [
                    'allowed' => implode(', ', $this->allowedExtensions),
                    'invalid' => pathinfo($fileName, PATHINFO_EXTENSION)
                ])
            ]);
        }

        if (!FileHelper::validateExtension($fileName, $this->allowedExtensions, false)) {
            throw new ValidationException(['fileName' =>
                Lang::get('cms::lang.cms_object.invalid_file_extension', [
                    'allowed' => implode(', ', $this->allowedExtensions),
                    'invalid' => pathinfo($fileName, PATHINFO_EXTENSION)
                ])
            ]);
        }

        if (!FileHelper::validatePath($fileName, null)) {
            throw new ValidationException(['fileName' =>

View on GitHub (pinned to b608633a7e)

When it happens

Trigger: Thrown at modules/cms/classes/Asset.php:398 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of octobercms/october@b608633a7e (2026-08-21). Data as JSON: /api/errors/08a073f78834b030. Report an issue: GitHub.