Bug 374279

At startup of plasma-discover the below log is shown. In there I believe this might be important errors:
- Could not open the AppStream metadata pool
- ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"

I am not sure if the AppStream metadata pool is related to the update to AppStream 0.10.5. It also shows a message in plasma-discover itself to ensure that AppStream is setup correctly. Previously with 0.10.3 this message wasn't shown. The upgrade was done as that plasma-desktop now requires at least 0.10.4

With regards to the api.kdelook.org, it seems as if the link is wrong. Trying to access the link it gives me a login box, but my opendesktop credentials does not work there. Changing the link to "https://api.kde-look.org/ocs/v1/content/categories", gives me an xml file of the available categories. 

Full log when starting plasma-discover:

tittiatcoke@HQVMT44011:~% plasma-discover
invalid kns backend! "/etc/xdg/ksysguard.knsrc" because: "Config group not found! Check your KNS3 installation."
invalid kns backend! "/etc/xdg/servicemenu.knsrc" because: "Config group not found! Check your KNS3 installation."
Could not open the AppStream metadata pool
Discarding invalid backend "ksysguard.knsrc"
Discarding invalid backend "servicemenu.knsrc"
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
org.kde.knewstuff.core: Redirected to  "https://autoconfig.kde.org/ocs/providers.xml" ...
ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"
org.kde.knewstuff: engine error "Network error. (5)"
kns error KNSBackend(0x1c23a10, name = "/etc/xdg/k3btheme.knsrc") "Network error. (5)"
ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"
ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"
ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"
ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"
ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"
ProviderManager::authenticate: No authentication credentials provided, aborting. "http://api.kdelook.org/v1/content/categories"
org.kde.knewstuff.core: Redirected to  "https://games.kde.org/...somthing.../providers.xml" ...
org.kde.knewstuff.core: "Error transferring https://games.kde.org/...somthing.../providers.xml - server replied: Not Found"
org.kde.knewstuff: engine error "Loading of providers from file: http://games.kde.org/...somthing.../providers.xml#This must change of course failed"
kns error KNSBackend(0x1bea8f0, name = "/etc/xdg/kmines.knsrc") "Loading of providers from file: http://games.kde.org/...somthing.../providers.xml#This must change of course failed"
org.kde.knewstuff.core: Could not find category "KAddressbook Theme"
org.kde.knewstuff: engine error "All categories are missing"
kns error KNSBackend(0x1262a50, name = "/etc/xdg/kaddressbook_themes.knsrc") "All categories are missing"
org.kde.knewstuff.core: Could not find category "Akonadi Email Providers"
org.kde.knewstuff: engine error "All categories are missing"
kns error KNSBackend(0x128e420, name = "/etc/xdg/accountwizard.knsrc") "All categories are missing"
org.kde.knewstuff.core: Could not find category "Xfce Icon Theme"
org.kde.knewstuff: engine error "All categories are missing"
kns error KNSBackend(0x1c06a80, name = "/etc/xdg/cgcicon.knsrc") "All categories are missing"