Unable to open mindmaps dot km files

Hi,

I have already been using the mindmap app for sometime now - Today when I opened the mind maps - I see a blank dashboard with the following alert -

“The file is not a valid mind map file and may cause file corruption if you continue editing.”

If I go to Administration Settings → Logging and check the log - I see the following error messages -

`[no app in context] Error: InvalidArgumentException: Dashboard widget with this id has already been registered at <>

/var/www/nextcloud/lib/private/Dashboard/Manager.php line 94
OC\Dashboard\Manager->registerWidget()
/var/www/nextcloud/lib/private/Dashboard/Manager.php line 131
OC\Dashboard\Manager->loadLazyPanels()
/var/www/nextcloud/apps/dashboard/lib/Controller/DashboardController.php line 101
OC\Dashboard\Manager->getWidgets()
/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 225
OCA\Dashboard\Controller\DashboardController->index()
/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 133
OC\AppFramework\Http\Dispatcher->executeController()
/var/www/nextcloud/lib/private/AppFramework/App.php line 172
OC\AppFramework\Http\Dispatcher->dispatch()
/var/www/nextcloud/lib/private/Route/Router.php line 298
OC\AppFramework\App::main()
/var/www/nextcloud/lib/base.php line 1047
OC\Route\Router->match()
/var/www/nextcloud/index.php line 36
OC::handleRequest()
GET /apps/dashboard/
from 127.0.0.1 by cerulean at 2022-12-24T13:21:02+00:00`

Also I get the following issue -

`[no app in context] Error: Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.

PROPFIND /remote.php/dav/versions/cerulean/versions/35534
from 127.0.0.1 by cerulean at 2022-12-24T13:06:21+00:00`

{“reqId”:“w3cxRTpMjiUV1jIVl6vC”,“level”:3,“time”:“2022-12-24T13:06:21+00:00”,“remoteAddr”:“127.0.0.1”,“user”:“cerulean”,“app”:“no app in context”,“method”:“PROPFIND”,“url”:“/remote.php/dav/versions/cerulean/versions/35534”,“message”:“Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.”,“userAgent”:“Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36”,“version”:“25.0.2.3”,“data”:,“id”:“63a6fe05ec526”}

Can someone please help me resolve this ?

Start by reproducing the blank dashboard and invalid mind-map warning, then inspect the reported Dashboard/Manager.php line 94 and dashboard DashboardController.php line 101 paths. Compare this with the PROPFIND decryption error for versions/35534; done should identify the cause of the failed file opening and verify that the affected .km file opens without either error.