with nextcloud desktop try to share a folder
nextcloud desktop hangs
from windows explorer
use context menu
-> share via nextcloud -> share options
klick plus sign after Link Teilen
the app hangs

I think this happens only, when in nextcloud configuration the option is set to require passwords
Client version: 2.6.0 stable
Operating system: windows 10
OS language: german

Nextcloud version: 16.0.4
We can confirm the bug. https://help.nextcloud.com/t/nextcloud-client-2-6-0-link-teilen-share-freigabe/61975
I confirm the problem, since version 2.5.3 to 2.7.0 (daily build). Only when a password is mandatory to share a file in server configuration.
The issue is present on windows 10 and Ubuntu.
[OCC::AccessManager::createRequest 4 "" "https://minube.com/ocs/v2.php/apps/files_sharing/api/v1/shares?format=json" has X-Request-ID "b6633279-afcd-4217-acbf-3d7d6e43738c"
[OCC::AbstractNetworkJob::start OCC::OcsShareJob created for "https://minube.com" + "ocs/v2.php/apps/files_sharing/api/v1/shares" ""
[OCC::WebFlowCredentials::slotFinished request finished
[OCC::AbstractNetworkJob::slotFinished QNetworkReply::ContentAccessDenied "El servidor respondi贸 "403 Forbidden" a "POST https://minube.com/ocs/v2.php/apps/files_sharing/api/v1/shares?format=json"" QVariant(int, 403)
[OCC::WebFlowCredentials::stillValid QNetworkReply::ContentAccessDenied
[OCC::WebFlowCredentials::stillValid "Error transferring https://minube.com/ocs/v2.php/apps/files_sharing/api/v1/shares?format=json - server replied: Forbidden"
Same on macOS 10.15.2 with Nextcloud Desktop 2.6.2, because for security reason a password is mandatory.
I run everytime into an obvious bug of Nextcloud + Clients when doing just a bit more than basic stuff... :(
Most helpful comment
We can confirm the bug. https://help.nextcloud.com/t/nextcloud-client-2-6-0-link-teilen-share-freigabe/61975