Check return value of OC_App::getAppPath() and verify info.xml exists.
Check return value of OC_App::getAppPath() and verify info.xml exists.

xx621998xx/server,pmattern/server,pixelipo/server,michaelletzgus/nextcloud-server,phil-davis/core,nextcloud/server,sharidas/core,pmattern/server,endsguy/server,pixelipo/server,pixelipo/server,cernbox/core,cernbox/core,endsguy/server,sharidas/core,bluelml/core,lrytz/core,lrytz/core,nextcloud/server,jbicha/server,whitekiba/server,owncloud/core,xx621998xx/server,sharidas/core,IljaN/core,andreas-p/nextcloud-server,pollopolea/core,andreas-p/nextcloud-server,Ardinis/server,michaelletzgus/nextcloud-server,xx621998xx/server,whitekiba/server,jbicha/server,pmattern/server,jbicha/server,andreas-p/nextcloud-server,IljaN/core,michaelletzgus/nextcloud-server,pollopolea/core,pmattern/server,lrytz/core,cernbox/core,owncloud/core,owncloud/core,lrytz/core,pixelipo/server,endsguy/server,owncloud/core,endsguy/server,IljaN/core,jbicha/server,whitekiba/server,pollopolea/core,lrytz/core,pollopolea/core,bluelml/core,whitekiba/server,Ardinis/server,andreas-p/nextcloud-server,Ardinis/server,endsguy/server,nextcloud/server,pmattern/server,michaelletzgus/nextcloud-server,bluelml/core,nextcloud/server,bluelml/core,Ardinis/server,Ardinis/server,xx621998xx/server,IljaN/core,xx621998xx/server,pollopolea/core,jbicha/server,owncloud/core,cernbox/core,pixelipo/server,whitekiba/server,bluelml/core,sharidas/core,IljaN/core,cernbox/core,sharidas/core,andreas-p/nextcloud-server