Each time i speak to Proctor Ingram to start Liberty Reprimed. The game freezes & restarts when she says follow me. Have gone away for a few days and go back, the same thing happens.

Anyone else have this problem?

Which version? On PC, try resetting the quest or try redownloading the game or reset it to an earlier save. I'm not sure about console. I had a problem where my game becomes freezed at Diamond City, but redownloading the game fixed it for me.

Next time out this on the spoiler section and try reloading a save

I am using Xbox one, have tried loading an old save as well and that does not work