[Koha] Unable to save

I was going to add bar codes at 6 am this morning but got this error instead. I had just upgraded to 20.05. Can't open /var/log/koha/library/opac-error.log (Permission denied) at /usr/share/perl5/Log/Log4perl/Appender/File.pm line 151. For help, please send mail to the webmaster ([no address given]<mailto:%5Bno%20address%20given%5D>), giving this error message and the time and date of the error. What can I do? Br Raphael Prince of Peace Abbey Oceanside CA Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10