I am having issues running a Time Triggered Function App in the Azure Portal, these are the replication steps:

1- Function App Deployed to the Azure Portal,
2- Click on the Time Triggered Function I want to test
3- Click on Code + Test
4- Click on Test/Run
5- In Input, Select _master (Host Key)
6- Click on Run
Result: In the output window it says 404 Not Found

Does anyone has any ideas of why this is happening?
The function does not trigger automatically or by the time scheduled, but it seems to be deployed correctly which is very confusing.

I should also say that none of the other options offered in the dropdown work, and they all give me different errors:

default (Function Key) gives me 401 Unauthorized
default (Host Key) gives me 403 Forbidden
microsoftgraphconfiguration gives me 403 Forbidden

Many thanks in advance!