today I upgraded on a test installation OMP from 3.0.1 to 3.1.1-1.
the upgrade script messages were all ok, but when I go to the website I see an error:
Notice: Undefined index: it_IT in omp/www/lib/pkp/classes/context/Context.inc.php on line 273
then in the admin Area i can read the same error and is impossible to manage the website because the page doesn’t end to load.
Hmmm… Apparently you have some entries in your DB having the locale = it_IT, which I do not know how it come, because the Italian is not supported yet… Could you maybe search in your DB where it_IT occurs?
But, however, I am not sure that this is the actual problem, because it seems to just be a notice. Do you see any errors in your server php log file?
you reply suggested me I had only a problem with warning level settings.
I managed it and now OMP seems working fine.