Checking logs this morning...
Is this a hacking attempt? I have no cloud connection. sys:12022-07-16 04:13:27.102 Received cloud request for App 5 that does not exist, path: /device/15 from 54.162.122.170
sys:12022-07-16 04:13:27.099 Received cloud request for App 5 that does not exist, path: /device/61 from 54.91.60.175
sys:12022-07-16 04:13:27.089 Received cloud request for App 5 that does not exist, path: /device/62 from 54.242.91.101
sys:12022-07-16 04:11:04.578 Received cloud request for App 5 that does not exist, path: /device/62 from 44.200.166.132
sys:12022-07-16 04:11:04.577 Received cloud request for App 5 that does not exist, path: /device/15 from 18.207.132.125
sys:12022-07-16 04:11:04.577 Received cloud request for App 5 that does not exist, path: /device/61 from 52.90.164.57
sys:12022-07-16 04:11:04.577 Received cloud request for App 5 that does not exist, path: /device/18 from 52.23.218.34
sys:12022-07-15 23:21:28.063 Received cloud request for App 5 that does not exist, path: /device/62 from 34.231.225.45
sys:12022-07-15 22:17:25.953 Received cloud request for App 5 that does not exist, path: /device/18 from 3.235.84.49
sys:12022-07-15 22:17:25.447 Received cloud request for App 5 that does not exist, path: /device/18 from 3.235.84.49
You likely had attempted to link your hub to a cloud service (that includes the Hubitat mobile app) and since then you removed the app, but didn't remove the IP address of your hub from the service, and the service is trying to communicate with the app that has since been removed. Identifying what service that might be, and removing the hub's IP will stop the errors.
Likely that. Delete hubitat skill on alexa and the alexa skill on hubitat.... (btw Alexa is cloud based which is why it's sending you connection errors) Once done confirm on alexa that anything related to hubitat is gone. Reset everything back up. You should be good after that. I would also recommend that you set a DHCP reservation for both hubitat and your alexa speakers. This will ensure they always see eachother where they expect to see eachother.
I would also recommend Echo Speaks be installed on Hubitat so you can use the speakers for announcements.