Luckybackup and KWallet Question

Running LEAP 42.1 with KDE desktop and using luckybackup to copy files to NAS on my lan.
When I try to copy to the NAS there is a request for the NAS pw. I have now succeeded in getting this pw stored in my KWallet so that when I run luckybackup I get a request for the wallet password which once entered allows the backup to proceed. So far so good but I am getting an error reported in luckybackup as follows:-

  Pass a valid window to KWallet::Wallet::openWallet(). 

AFAIK I have the same setup as when I was using openSuSe 13.2 but this error did not appear then.

I cannot find any settings to tweak which might influence this behaviour and the relationship between KWallet and luckybackup.
Can somebody please advise how I amy prevent this “error”.
Budgie2

There is conflict between kwallet version ie 4 and 5 If I understand it 5 may not work with 4 apps. and the settings programs for the two conflict. I suspect this is where the problems are.

Hi and thanks for the suggestion. I can live with the problem for now and hope it will be sorted in time. Real problem is with KWallet which is not yet fit for use by those not knowing what is going on in depth.
It is strange that LEAP 42.1 should have been released with a kind of hybrid mix of KDE 4 & 5 stuff, but no fundamental complaints as I get used to the transition from 13.2 although still finding my way around.