Notifications and MediaPlayer not working [FIXED]

I think its my fault...
I think i had the old version of hass integration so i removed the integrations things, then removed it in hacs, restarted HA, installed the hass agent 2 thing, used the auto discovery thing, but weirdly my pc showed up with a name i did not use anymore within the hass app(though maybe it shows the machines name, then it would be correct). Anyways, now at least the notify entity and media player entity started showing up, but media player says its unavailable and notifications do not end up on my pc though I send it correctly through the notify.mypc service

Thanks for your help :)