webMethods Knowlegebase : JavaScript errors in MWS while trying to save changes on a VFS (1804212)

Problem

JavaScript errors in MWS while trying to save changes on a VFS which is not at the lowest level:

user.current.start.page:1122 Uncaught TypeError: Cannot read property 'toString' of null

at saveVFS (user.current.start.page:1122)

at HTMLButtonElement.onclick (user.current.start.page:1113)

saveVFS @ user.current.start.page:1122

onclick @ user.current.start.page:1113

JavaScript errors:

Uncaught TypeError: Cannot read property 'getValue' of null

at user.current.start.page:31624

user.current.start.page:31892 Uncaught TypeError: Cannot read property 'hide' of null

at user.current.start.page:31892

user.current.start.page:32353 Uncaught TypeError: Cannot read property 'length' of undefined

at user.current.start.page:32353

3dot.gif:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT

general.js?l=en_US&v=200529155223:6249 Uncaught Array(1)0: TypeError: Cannot read property 'refresh' of null

at eval (eval at CAF._staticEval (http://gva6394:8585/ui/dyn/general.js?l=en_US&v=200529155223:6257:1), <anonymous>:2:47)

at Object.CAF._staticEval (http://gva6394:8585/ui/dyn/general.js?l=en_US&v=200529155223:6257:)

at evalNext (http://gva6394:8585/ui/dyn/general.js?l=en_US&v=200529155223:6241:)

at String.evalScripts (http://gva6394:8585/ui/dyn/general.js?l=en_US&v=200529155223:6252:1)

at http://gva6394:8585/ui/dyn/general.js?l=en_US&v=200529155223:6875:28length: 1__proto__: Array(0)

general.js?l=en_US&v=200529155223:6249 Uncaught