After restoring system using Backupper, can't backup - get error 4098, invalid parameter
I restored a system backup using Backupper v4.06 (latest version) standard - that backup had been made on 2/27. After making lots of system changes the last 2 days, tried to make a new, full system backup. For no apparent reason, now I get an error code 4098, 'invalid parameter'.
I checked FAQ - nothing. Also, found discussion thread from several years ago that went unanswered.