Application Links Page not loading any tabs

[Sebastian Böder]

After Upgrading from JIRA 7.1.9 Build 71013 to JIRA 7.4.3 Build 74005.
The Application links have to be updated. After aktivation OAuth they still get marked as not working and if i open the application link settings i get two error messages.

1. "Deprecated authentication type
This application link uses a deprecated authentication type.
You should click Update locally to move to OAuth authentication. Doing this will remove Trusted Applications authentication from this end of the link.
You'll then need to manually remove Trusted Applications authentication from the Confluence end of the link.
You might be able to automatically update this link, if you obtain temporary sysadmin permissions on Confluence and then refresh this page."

2. "There has been a failure while loading the page.
None of the tabs will be loaded."

How can i fix both errors?

I tried to open the page with
- Chrome Version 60.0.3112.113
- Firefox 45.0.2
- Internetexplorer 11.0.9600.18665

None of them manage to load the tabs.

[Suhas Patil]

HI,

Are the both applications SSLed? If not I would suggest to SSL both applications and then create two way trusted link.

//Suhas