During child folder validation ill get this error:

Any hint someone?

Inquiry Validation SML
Inquiry Validation SSC
Inquiry Validation SST
Inquiry Validation TRN
Inquiry Validation VCI
Inquiry Validation VTE
<0001 09/10/2019 18:16:18 : No execution of migration phase 2 following error 1  
<0001 Error in the migration processes, validation cannot be continued.
Generation End 09/10/19 18:16:18
<0001 The validation of folder xxxTEST has failed because of a serious error

>0001 End of log file error 09/10/19 18:16:18