Hi Glenn
Hope you are well.
I have just opened a barclays bank account and I can’t seem to upload existing transactions (ahead of setting up the feed) - I have tried csv, qbo and ofx - all are reporting the same error message above. I can type them in of course which is the easy work-around but I thought I would let you know in any event.
Very happy to share with you the files too just ping me an email at tim.dew then my domain.
I would appreciate asking you an offline question too if thats ok.
Many thanks - big supporter still after all these years 
Tim