Help with SendKeys in PowerShell to Dismiss a Startup Pop-up

Hey everyone! I'm facing an issue with a computer that has a program set to launch on startup, but it's getting blocked by a pop-up that needs to be cleared by hitting the enter key. I've created a PowerShell script meant to press enter once every minute for 15 minutes to handle this, but it seems like the script isn't working at all—nothing gets sent for the whole duration and then it just exits. I made sure to change the execution policy to 'RemoteSigned' to allow the script to run, but I'm not sure if there's something wrong with the script itself or if I'm dealing with a permissions issue. Here's the script I'm using:

# Create a WScript.Shell COM object for sending keystrokes
$wshell = New-Object -ComObject wscript.shell

# Repeat 15 times (once per minute)
for ($i = 1; $i -le 15; $i++) {
# Send the Enter key
$wshell.SendKeys("~")

# Wait for 60 seconds before next press
Start-Sleep -Seconds 60
}

#Script ends after 15 presses

Any guidance would be greatly appreciated!