Merge pull request #52042 from nextcloud/backport/52013/stable30

[stable30] fix: Handle missing share providers when promoting reshares

Author: susnux

lib/private/Share20/Manager.php

@@ -1083,7 +1083,12 @@ protected function promoteReshares(IShare $share): void {
 
 		foreach ($userIds as $userId) {
 			foreach ($shareTypes as $shareType) {
-				$provider = $this->factory->getProviderForType($shareType);
+				try {
+					$provider = $this->factory->getProviderForType($shareType);
+				} catch (ProviderException $e) {
+					continue;
+				}
+
 				if ($node instanceof Folder) {
 					/* We need to get all shares by this user to get subshares */
 					$shares = $provider->getSharesBy($userId, $shareType, null, false, -1, 0);