Opening Gantt and/or clicking in it, gives error
When I try to open the Gantt, or when it's already open and I click anywhere in it, I often get this error:
Traceback:
TypeError: Cannot read property 'concat' of undefined
at ClassDefEx.calculateEarlyEffectiveEndDateInterval$ (webpack:///./node_modules/bryntum-gantt/gantt.module.js?
375096)
at tryCatch (webpack:///./node_modules/regenerator-runtime/runtime.js?:63:40)
at Generator.invoke [as _invoke] (webpack:///./node_modules/regenerator-runtime/runtime.js?:293:22)
at Generator.eval [as next] (webpack:///./node_modules/regenerator-runtime/runtime.js?:118:21)
at Map.continueCalculation (webpack:///./node_modules/bryntum-gantt/gantt.module.js?61161)
at EngineTransaction.onReadIdentifier (webpack:///./node_modules/bryntum-gantt/gantt.module.js?110158)
at EngineTransaction.calculateTransitionsStackGen$ (webpack:///./node_modules/bryntum-gantt/gantt.module.js?115265)
at tryCatch (webpack:///./node_modules/regenerator-runtime/runtime.js?:63:40)
at Generator.invoke [as _invoke] (webpack:///./node_modules/regenerator-runtime/runtime.js?:293:22)
at Generator.eval [as next] (webpack:///./node_modules/regenerator-runtime/runtime.js?:118:21)