Firstly agree with
@stampcoin I would not use that Connector for that check on Email. (aka Mail)
here is what I would like you to try. It will only take a moment and is easier than walking you through Monitor with Teams apps.
Add 4 labels to the screen, you will remove them later, so just humor me
1. Label1 put in the value your User().Email or if you wish to stick with the connector then so be it put that value in
2. To setup label 2 make the following change (just comment out your stuff)
In your IsBlank, instead of the notify put
Set(notifyValue, "Email was blank");
Then put notifyValue in Label2
3.Label3 Setup
In your second If in the is blank checks comment out the notify and put
Set(isBlankCheck, "Something was blank");
then set that as label3
4. For label 4, where your Navigate is, comment it out
Set(navValue, "I should have navigated");
put that in Label 4
That will tell you the flow, what happened and what didn't.
If you made it to the Navigate part then we can debug further, if not, then its simply the notifies aren't appearing.
And we need to fix WHY not but at least youll know it was not going to navigate and you assumed no Notifies meant it worked when it actually didnt.