Well, without seeing the configuration file, it’s hard to tell. I encountered one case where the configuration has MQTT enabled, the issue is that the firmware then immediately starts to connect to MQTT server and thus the rest of the import is not processed in time resulting in a time out. You can file a support ticket with your configuration attached so we can take a look. If we can identify a problem, we can edit the configuration file by deleting certain data that triggers the issue and then the import should be successful.