SOLVED - Problem adding Icons to KMM5.1.2

When I install Oxygen or Tango icons to my KMM 5.1.2 on Linux Mint 21.2,
I am getting an error
“No storage object attached to MyMoneyFile/kmymoney/mymoney/mymoneyfile.cpp:200”

ANy thoughts please?

this corrected itself after TWO reboots.