Mendix Version 7 to 8

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After upgrading mendix project from 7 to 8 getting below error Cannot read property 'getTrackId' of null TypeError: Cannot read property 'getTrackId' of null     at o (http://localhost:8888/mxclientsystem/mxui/mxui.js?637538440508706006:79:282968)     at t.reloadApp (http://localhost:8888/mxclientsystem/mxui/mxui.js?637538440508706006:79:282294)     at http://localhost:8888/mxclientsystem/mxui/mxui.js?637538440508706006:79:206147     at http://localhost:8888/mxclientsystem/mxui/mxui.js?637538440508706006:79:386914     at Array.forEach (<anonymous>)     at http://localhost:8888/mxclientsystem/mxui/mxui.js?637538440508706006:79:386886     at http://localhost:8888/mxclientsystem/mxui/mxui.js?637538440508706006:79:386277     at Array.forEach (<anonymous>)     at WebSocket.socket.onmessage (http://localhost:8888/mxclientsystem/mxui/mxui.js?637538440508706006:79:386237)   Does anyone know how to resolve this?
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1 answers
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Hi,

these errors usually indicate that some custom widgets are outdated. Try to update or remove the used custom widget.

regards, Fabian

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