Merge pull request #56514 from nextcloud/backport/56138/stable31

[stable31] fix(files): Do not fail on missing sidebar in files list

apps/files/src/actions/sidebarAction.ts

@@ -45,15 +45,15 @@ export const action = new FileAction({
 	async exec(node: Node, view: View, dir: string) {
 		try {
 			// If the sidebar is already open for the current file, do nothing
-			if (window.OCA.Files.Sidebar.file === node.path) {
+			if (window.OCA.Files?.Sidebar?.file === node.path) {
 				logger.debug('Sidebar already open for this file', { node })
 				return null
 			}
 			// Open sidebar and set active tab to sharing by default
-			window.OCA.Files.Sidebar.setActiveTab('sharing')
+			window.OCA.Files?.Sidebar?.setActiveTab('sharing')
 
 			// TODO: migrate Sidebar to use a Node instead
-			await window.OCA.Files.Sidebar.open(node.path)
+			await window.OCA.Files?.Sidebar?.open(node.path)
 
 			// Silently update current fileid
 			window.OCP?.Files?.Router?.goToRoute(