[update] show default error message if empty message
[update] show default error message if empty message

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