Office online server Exception: Could not find urlsrc in WOPI

Hi all,
I’ve setup an Office Online server running on Windows Server 2016. As it has been setup for testing purpose http is enabled and
The command “(GetOfficeWebAppsFarm).machines” is returning a healthy status and I get a wopi xml file that seems ok ith the /hosting/discovery url.
The Office online Server is reachable via http in The Office Online App for Nextcloud.

However I get these errors when trying to edit some office files:

Error

Failed to open the requested file.

[Nextcloud version : Nextcloud 22.1.1
Operating system and version : Ubuntu 20.04
Apache or nginx version: 2.4
PHP version r7.4.23

Output of the nextcloud log:

Exception: Could not find urlsrc in WOPI

    /var/www/nextcloud/apps/officeonline/lib/TokenManager.php - line 208:

    OCA\Officeonline\WOPI\Parser->getUrlSrcForFile()

    /var/www/nextcloud/apps/officeonline/lib/Controller/DocumentController.php - line 241:

    OCA\Officeonline\TokenManager->getToken("*** sensiti ... *")

    /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 217:

    OCA\Officeonline\Controller\DocumentController->index()

    /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 126:

    OC\AppFramework\Http\Dispatcher->executeController()

    /var/www/nextcloud/lib/private/AppFramework/App.php - line 156:

    OC\AppFramework\Http\Dispatcher->dispatch()

    /var/www/nextcloud/lib/private/Route/Router.php - line 301:

    OC\AppFramework\App::main()

    /var/www/nextcloud/lib/base.php - line 1000:

    OC\Route\Router->match()

    /var/www/nextcloud/index.php - line 36:

    OC::handleRequest()

Does anyone came accross this error?
Is there any detailed documentation about how to setup OOS with Nextcloud.

Thanks

I am having the same issue, Have you found a solution?