Error through extract the DEM

i would like to know what is the problem ??
how can i solve it ?? actually, i have tried many time bu using the tutorial steps to extract that >> between both of this images ::

At which step does the error message occur and what were your parameters for unwrapping?

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thank you for your reply >>
i used this parameters exactly >>

this problem occurred after import unwarpping … i went to need extracting the dem but this error occurred …

the term “topo_phase” in your screenshots indicates that you performed topographic phase removal.
This is only for differential interferometry and must not be done if you are intersted in DEM generation.