Error Message ?:0: attempt to index field 'rootFile' (a nil value)

DxO PureRAW Windows topics
1

I have a error message as ‘’ Error Message ?:0: attempt to index field ‘rootFile’ (a nil value) when using DXO PureRaw 2 in Lightroom.

I use the process following those steps.

1- In the development module, I choose export and process with PureRaw,
2- Optimize with DeepPrime.

At the finishing of the process. the message appears.

After, I import the photo from the designed folder in PureRaw.
It is automatically import in the folder of the origin photo.

At the finishing of the process. the message appears.