error message cannot create dwg during export from Microstation CE

We want to export from Microstation CE upd 13 a dgn to Autocad 2021. While exporting we get the error message cannot create dwg. There are write permissions in folder where the dwg should be. The seed.dwg is located in C:\Program Files\Bentley\MicroStation CONNECT Edition\MicroStation\Default\Seed. What could be causing this.