Error when trying to save using backend - Joomla! Forum - community, help and support

just upgraded 1.5 2.5 appeared successful website , running. cannot save or save/exit. message: fatal error: call undefined method jfilteroutput::stringurlunicodeslug() in /home/content/11/7864911/html/libraries/joomla/application/application.php on line 876

i can update front end not end. website hosted on godadddy.

any ideas??

howard

[mod note: moved general forum upgrade forum; ]
to you, in future, find correct forum topic please read which forum post question have put together.

1. make sure database has been updated reflect changes update(s)
   
   1. go extensions=>extension manager->database tab
   2. click fix button (top right toolbar).
2. also , make sure clear joomla cache files.
   1. go extensions=>extension manager->updates tab
   2. click purge cache

if not resolve issue then:
it appear installation/upgrade process not completed correctly or in way corrupted. therefore can reinstall full package rectify omissions.

1. backup site
   in unfortunate event have not done so, backup site , database now.
2. reinstall joomla_2.5.7-full-stable_package.zip
   1. download copy of joomla_2.5.7-full-stable_package.zip
   2. go extensions ⇒ extension manager ⇒ install tab
   3. in upload package file panel
      1. browse downloaded file.
      2. click upload , install.
3. final steps
   1. go extensions ⇒ extension manager ⇒ discover tab
      
      1. click discover
         • this show new extensions available
         • it show old, deprecated one's, particularly if site updated 1.6.x, aware.
      2. select new extensions only
      3. click install.
   2. go extensions ⇒ extension manager ⇒ database tab.
      • click fix
   3. go extensions ⇒ extension manager ⇒ discover tab
      • click purge cache
   4. now check out site , features both existing , new make sure working.
4. backup site
   once checks completed (and assuming alright now) must ensure have clean copy, @ point in time, of site , database part of overall backup plan should have in place site. so run fresh of site , database.

if not resolve issue.
suggest rerun migration backup of 1.5 database , web site files , directories time perhaps run on test server first.

also please run forum post assistant provide information try , resolve issue.
please follow instructions in post , program pack closely.