Hi, I use Zotero on firefox 3.6.13 on win 7. While i sync Zotero, the program shows this error 1791534914.

[JavaScript Error: "uncaught exception: A scheduled server upgrade is in progress. Please try again later."]

[JavaScript Error: "A scheduled server upgrade is in progress. Please try again later." {file: "chrome://zotero/content/xpcom/sync.js" line: 872}]

[JavaScript Error: "uncaught exception: A scheduled server upgrade is in progress. Please try again later."]

[JavaScript Error: "uncaught exception: A scheduled server upgrade is in progress. Please try again later."]

[JavaScript Error: "missing ; before statement" {file: "file:///C:/Program%20Files/Mozilla%20Firefox/components/nsUpdateService.js" line: 108 column: 2 source: " let temp = { };
"}]

[JavaScript Error: "uncaught exception: [Exception... "Component returned failure code: 0x80570016 (NS_ERROR_XPC_GS_RETURNED_FAILURE) [nsIJSCID.getService]" nsresult: "0x80570016 (NS_ERROR_XPC_GS_RETURNED_FAILURE)" location: "JS frame :: chrome://browser/content/utilityOverlay.js :: buildHelpMenu :: line 454" data: no]"]

[JavaScript Error: "nessun elemento trovato" {file: "https://www.google.com/calendar/perf" line: 1}]




How can I solve the problem? THanks