User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
Firefox/60.0
Build Identifier: 

A string was encountered that is not valid in UTF-8. The system encoding is
"UTF-8". Refer to https://www.suse.com/support/kb/doc?id=7018056

Details: invalid byte sequence in UTF-8
Caller: /usr/lib64/ruby/vendor-ruby/2.5.0/yast/builtins.rb:934:in `tr'

Reproducible: Always

Steps to Reproduce:
1. edit /etc/sane.d/gt68xx.conf
2. change paragraph

# Autodetect Genius ColorPage-SF600
usb 0x0458 0x2021

to

# Autodetect KYE Systems Corp. (Mouse Systems) ColorPage-SF600
usb 0x0458 0x2021
override "ColorPage-SF600"
vendor "Genius"
model "ColorPage-SF600"
firmware "/usr/share/sane/gt68xx/cism216.fw"

3. start yast2 scanner tool
Actual Results:  
error message with invitation to send the yast2 error log

Expected Results:  
system should detect an install the Genius ColorPage-SF600 scanner.