Run dnn module with openCV on ubuntu

I trying to run a dnn module with openCV version 4.4.0 on powerPC with ubuntu version 2.0 codeName - jethro.
I using the function readNetFromTensorFlow to read pb files that described the net,
but the parse does not work well and when I call forward function it throw exception.

It is run perfectly on windows.

I think there is no problem with Big/Little endian (I saw that Cmake checked this issue).
I will be happy to get some help, how can I read the pb files correctly.