F is null error

Hi, can anyone help me? Any attempt to publish gives me the error «F is null»

Exception:

message: F is null

fileName: http://lectoraonline.trivantis.com/app/BN001112/js/publish/publish.js

lineNumber: 7

name: TypeError

stack:

at /app/BN001112/js/publish/publish.js:7([object Object],0,[object Array],[object Object])

at /app/BN001112/js/publish/publish.js:7([object Object],0,[object Array],[object Object])

at /app/BN001112/js/publish/publish.js:7([object Object],0,[object Array],[object Object])

at /app/BN001112/js/publish/publish.js:7([object Object],"",[object Array],[object Object])

at /app/BN001112/js/publish/publish.js:7(0,"",[object Array],[object Object])

at /app/BN001112/js/publish/publish.js:7()

at /app/BN001112/js/publish/dlgPublish.js:7()

at /app/BN001112/js/publish/dlgPublish.js:7(-6)