Issue installing Xero app

I'm trialling out Akaunting on my self-hosted server.
It has been installed and appears to function correctly.
However, I cannot install the Xero app. When I click on it, it starts and hangs at 25% downloading.
Is there an issue specifically with the Xero app? I have tried other free apps and they all download and install without issues.

I think the inability to download was linked to the built-in firewall. I disabled the firewall in the .env file and downloading and installing the plugin then worked.

A further update: after installing the app, I realised it doesn't actually work. This might be because there's a comment about having the double-entry accounting app which I don't have. But it's not explicitly mentioned if this is a prerequisite to using the Xero app...

As a second option, I signed up for a trial on the cloud platform. First app I want to install is the Xero app. It doesn't install!

On my cloud platform, it goes up to 100% in the installation process and then just hangs there. I have tried other apps, they install OK.

As a trial user, it seems impossible to get any support - it's only available to people who have already purchased. The dedicated support is also a payable add-on.

It's a shame as this software looked like a nice alternative to Xero but having everything including support behind a paywall without any apparent support before buying during a trial period is a turn-off :(

I have run into this with the Xero app too. It does require the Double Entry app, otherwise it installs but does not actually work. On self hosted setups, firewalls and blocked outbound requests often cause the download to stall. On cloud trials, the Xero app seems flaky and support usually confirms it is a known issue. Sadly, without paid support there is not much you can do other than wait or choose another integration.