resolve-issues
🟥 ERROR: Package Uninstall: Missing manifest file.​

Solution
- go to phpMyAdmin page
- find database
_joomla, table_extensions - find app that you want to uninstall from Joomla, e.g.
pkg_POWrSocialFeedin this case and copy it
- go to
administrator/manifests/packagesdirectory - find XML file of app you want to uninstall from Joomla (it can be
pkg_POWRSocialFeed.xml,pkg_powrsocialfeed.xml, etc) and rename it to name that was copied above, i.e.pkg_POWrSocialFeed.xml - go to joomla administrator extensions page and try to uninstall extension
🟥 ERROR: Undefined constant "JPATH_"​

Solution (src: https://issues.joomla.org/tracker/joomla-cms/38840)
- download plugin for joomla https://www.powr.io/joomla/pkg_powrsocialfeed.zip
- please change
pkg_powrsocialfeedpart according to app type
- please change
- unpack downloaded file
- unpack
pkg_powrsocialfeed/packages/mod_powrsocialfeed.zipfile - remove
pkg_powrsocialfeed/packages/mod_powrsocialfeed.zipfile - open file
pkg_powrsocialfeed/packages/mod_powrsocialfeed/mod_powrsocialfeed.xml - add string
client="site"
- archive
pkg_powrsocialfeed/packages/mod_powrsocialfeeddirectory - remove
pkg_powrsocialfeed/packages/mod_powrsocialfeeddirectory - archive
pkg_powrsocialfeeddirectory - try to install resulting
pkg_powrsocialfeed.zipto Joomla