WSPR configuration problem [fixed in v1.586]
I had to do a fresh install without backup (KiwiSDR_v1.486_BBB_Debian_10.11.img.xz)
WSPR and FT8 had been running before reinstall.
When i try to configure WSPR the grid square the field gets erase with a green flash no later than when the second character are entered.
(root cause for reinstall may have been syslog filling fs making system unaccessable)