NextCloudPi server becomes unresponsive after attempting to read mp4 file from Windows 10 web gui

NextcloudPi version : 1.20.7
Client: Windows 10 web gui

The issue you are facing:
Server becomes unresponsive after attempting to play mp4 file.
Is this the first time you’ve seen this error? No
Steps to replicate it:

  1. Try opening an mp4

Tried looking at the result of ncp-report but a lot of stuff in there and plenty of it truncated.

I presume the following is related:

RedisException: Connection lost

/var/www/nextcloud/lib/private/Memcache/Redis.php - line 54:

Redis->get("c8765bff9e0 ... 0")

/var/www/nextcloud/lib/private/Route/CachingRouter.php - line 56:

OC\Memcache\Redis->get("localhost#/ ... 0")

/var/www/nextcloud/lib/private/URLGenerator.php - line 79:

OC\Route\CachingRouter->generate("accessibili ... t", { v: "0"})

/var/www/nextcloud/apps/accessibility/lib/AppInfo/Application.php - line 70:

OC\URLGenerator->linkToRoute("accessibili ... t", { v: "0"})

/var/www/nextcloud/apps/accessibility/appinfo/app.php - line 31:

OCA\Accessibility\AppInfo\Application->injectJavascript()

/var/www/nextcloud/lib/private/legacy/app.php - line 265:

require_once("/var/www/ne ... p")

/var/www/nextcloud/lib/private/legacy/app.php - line 155:

OC_App::requireAppFile(OCA\Accessib ... {})

/var/www/nextcloud/lib/private/legacy/app.php - line 128:

OC_App::loadApp("accessibility")

/var/www/nextcloud/lib/private/Console/Application.php - line 125:

OC_App::loadApps()

/var/www/nextcloud/console.php - line 96:

OC\Console\Application->loadCommands(Symfony\Comp ... {}, Symfony\Comp ... {})

/var/www/nextcloud/occ - line 11:

require_once("/var/www/ne ... p")

Thanks