1 files changed, 6 insertions, 4 deletions
diff --git a/iOSClient/RichWorkspace/NCViewerRichWorkspaceWebView.swift b/iOSClient/RichWorkspace/NCViewerRichWorkspaceWebView.swift
index 6e6e177e2..9e9b6a1d5 100644
--- a/iOSClient/RichWorkspace/NCViewerRichWorkspaceWebView.swift
+++ b/iOSClient/RichWorkspace/NCViewerRichWorkspaceWebView.swift
@@ -103,10 +103,12 @@ class NCViewerRichWorkspaceWebView: UIViewController, WKNavigationDelegate, WKSc
     // MARK: -
 
     public func webView(_ webView: WKWebView, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
-        if let serverTrust = challenge.protectionSpace.serverTrust {
-            completionHandler(Foundation.URLSession.AuthChallengeDisposition.useCredential, URLCredential(trust: serverTrust))
-        } else {
-            completionHandler(URLSession.AuthChallengeDisposition.useCredential, nil)
+        DispatchQueue.global().async {
+            if let serverTrust = challenge.protectionSpace.serverTrust {
+                completionHandler(Foundation.URLSession.AuthChallengeDisposition.useCredential, URLCredential(trust: serverTrust))
+            } else {
+                completionHandler(URLSession.AuthChallengeDisposition.useCredential, nil)
+            }
         }
     }