I have had the same issue, but was able to resolve it with a certificate for my prestage enrollment package.

You can find info on creating a certificate for your packages here:

https://docs.jamf.com/technical-articles/Creating_a_Signing_Certificate_Using_Jamf_Pros_Built-in_CA_to_Use_for_Signing_Configuration_Profiles_and_Packages.html

@Harrie are you enabling the notify mechanism via configuration profile ? Would look like this:

<?xml version="1.0" encoding="UTF-8"?> <plist version="1.0">

<dict>

<key>Arguments</key>

<array>

<string>-reset</string>

<string>-JamfConnect</string>

<string>-Notify</string>

</array>

</dict>

</plist> ? 

I have both of these done and I am still getting that error. Is there a possibilty that the script "notifymech" that we use per the instructions is not working correctly. 

https://www.jamf.com/blog/zero-touch-deployment-with-jamf-pro-and-jamf-connect/ This is what I used as a guide. 

The “recalculating splines” is generic text that is part of the Notify mechanism of Jamf Connect Logins. It appears if there is no depnotify.log file to read from.Make sure you are not using -Notify in your authchanger settings. Typically, you just want authchanger -reset -JamfConnect

Above message is from Slack Admins thanks to tribuin ^^ In my case the notifymech script needs tobe updated to read the log. 

@jmancuso Are you saying to remove the-notify to get things to show up? Thier documentation says the opposite. I'm seeing the splines thing too but noticed that is I did a hard shutdown it showed the notify window once I turned it back on and logged in. I have a ticket open with Jamf on this.