I’m running Nextcloud 10 on Ubuntu 14.04 server. Want to upgrade to Nextcloud 11, but requires php 5.6 at minimum. After upgrading from php 5.5. to 5.6, Nextcloud web interface continued to function properly and thought I was all set to move forward with Nextcloud updates. However, when I proceeded to enable Nextclound Maintenance Mode (as seen below), but received error messages. I thought of editing the config.php but afraid it may cause a deeper issues and render the server inaccessible. Thank you for your support.
Update: Also want to mention that I am running Nextcloud 10.0.0, however, Ive been receiving an update notice saying owncloud 9.1.2 is now available.
root@cloudserver:/var/www/html/nextcloud# sudo -u www-data php occ maintenance:mode --on
An unhandled exception has been thrown:
Error: [] operator not supported for strings in /var/www/html/nextcloud/lib/private/App/InfoParser.php:187
Stack trace:
#0 /var/www/html/nextcloud/lib/private/App/InfoParser.php(189): OC\App\InfoParser->xmlToArray(Object(SimpleXMLElement))
#1 /var/www/html/nextcloud/lib/private/App/InfoParser.php(60): OC\App\InfoParser->xmlToArray(Object(SimpleXMLElement))
#2 /var/www/html/nextcloud/lib/private/legacy/app.php(678): OC\App\InfoParser->parse('/var/www/html/n...')
#3 /var/www/html/nextcloud/lib/private/legacy/app.php(650): OC_App::getAppInfo('/var/www/html/n...', true)
#4 /var/www/html/nextcloud/lib/private/legacy/app.php(637): OC_App::getAppVersionByPath('/var/www/html/n...')
#5 /var/www/html/nextcloud/lib/private/legacy/app.php(1003): OC_App::getAppVersion('files')
#6 /var/www/html/nextcloud/lib/private/legacy/util.php(1458): OC_App::shouldUpgrade('files')
#7 /var/www/html/nextcloud/lib/public/Util.php(708): OC_Util::needUpgrade(Object(OC\AllConfig))
#8 /var/www/html/nextcloud/lib/base.php(324): OCP\Util::needUpgrade()
#9 /var/www/html/nextcloud/lib/base.php(710): OC::checkUpgrade(false)
#10 /var/www/html/nextcloud/lib/base.php(1043): OC::init()
#11 /var/www/html/nextcloud/console.php(48): require_once('/var/www/html/n...')
#12 /var/www/html/nextcloud/occ(11): require_once('/var/www/html/n...')
#13 {main}root@cloudserver/var/www/html/nextcloud#