Invalid start_date argument for getDuration method too

[ramil]

Hello Shatao,
Please, don’t ask the same questions in different places. Let’s continue our discussion here:

Invalid start_date argument for getDuration method

hello Ramil, I have the same error: Uncaught (in promise) Error: Invalid start_date argument for getDuration method at Object._getStartEndConfig (dhtmlxgantt.js:10:1) at Object.hasDurationArguments (dhtmlxgantt.js:10:1) at a.hasDuration (dhtmlxgantt.js:10:1) at Object._hasDuration (dhtmlxgantt.js:10:1) at Object.t._isProjectEnd (dhtmlxgantt.js:34:1) at Object.e. [as _isProjectEnd] (dhtmlxgantt.js:10:1) at Object._calculateBranch (dhtmlxgantt.js:34:1) at Object. (dhtmlxgantt.js:34:1) a…