after a few minutes of working with the visual composer the publish/update button gets greyed out.
The chrome error console shows the following:
load-scripts.php?c=1&load=jquery-core,jquery-migrate,underscore,thickbox,utils,jquery-ui-core,jqu…:4 Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help, check http://xhr.spec.whatwg.org/.
Failed to clear temp storage: It was determined that certain files are unsafe for access within a Web application, or that too many calls are being made on file resources. SecurityError