[JavaScript Error: "Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI]" {file: "chrome://zotero/content/xpcom/storage/webdav.js" line: 205}]
[JavaScript Error: "WebDAV verification failed"]

You'll need to say what the actual problem is that you're experiencing. If you're referring to trying to set up WebDAV, make sure you're not adding spaces to the WebDAV URL.