IR302 Config management

Good morning

I have a problem with importing configuration on IR302.
With simple configurations backup and import of the configuration works well.
But I have an application where I implemented an OpenVPN server on IR302.
In this case the configuration backup (which also contains the certificates) has a size of about 33 Kb (will the backup have exported everything correctly or will it have truncated?).
When I try to import this configuration on another IR302 the operation fails.
This malfunction was not present on the IR300 model.
Can you help me?

Thank you