Can't active dext in application with enable SIP on Big Sur(11.2)

I have obtained the permission of driverkit, and the compilation and notarization passed. When I activate the dext in application, it will report Error :

Domain=OSSystemExtensionErrorDomain Code=8 "Invalid code signature or missing entitlements".

I searched a lot of information on the forum and followed the instructions, among which is disable SIP.
My App's entitlements is :
<dict>
        <key>com.apple.security.app-sandbox</key>
        <true/>
        <key>com.apple.security.files.user-selected.read-only</key>
        <true/>
        <key>com.apple.developer.system-extension.uninstall</key>
        <true/>
        <key>com.apple.developer.system-extension.install</key>
        <true/>
        <key>com.apple.security.get-task-allow</key>
        <true/>
</dict>
</plist>


dext's entitlements is :
<dict>
        <key>com.apple.developer.driverkit</key>
        <true/>
        <key>com.apple.developer.driverkit.transport.usb</key>
        <array>
                <dict>
                        <key>idVendor</key>
                        <integer>2414</integer>
                </dict>
        </array>
        <key>com.apple.security.app-sandbox</key>
        <true/>
        <key>com.apple.security.get-task-allow</key>
        <true/>
</dict>

Can some one help me ?
Thanks