Unable to save game

[Abstractmallard]

Im looking for some advice on the Xbox PC app Grounded (not grounded 2) will not save on a single player world, we've tried to create a new save file it flicks up the "Saving" for 1/2 second but does nothing. Then selecting an older save to save over just deletes the older back up.

We now only have 2 Back Up saves remaining (which are 2 days plus old)  and saving over just deletes them. Auto save isn't working either. 

We've tried disconnecting from the internet and reconnected as i seen someone suggesting this - but did nothing. 

Tried getting into combat then ending, which didnt help. 

Anyone have any solutions?