platform is not working

[Smy]

your platform is not working and we cannot upload invoices.

We couldn’t load the content in this help center

Refresh the page and try again in sometime.

[Lucas Modzelewski _Lumo_]

It looks like there is an ongoing issue which may affect some customers - even if it's not directly related to your problem, sometimes it is good to wait until it's fixed. 

To check the status visit: https://status.atlassian.com/ 

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On the other hand, you can always check with Jira Administrator if the given feature isn't a part of the app, because maybe Marketplace Partner is facing some issues e.g.. the latest release of their app have bugs