Unexpected error occurred on Button with Open Link and Web

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Hello,   I have a datagrid. One attribute contains a link (calculated variable). I added a button that should open the link (of this attribute) in the browser. Unfortunately I get the error below and have no idea about the reason. (by the way: The same functionality works at other places – with stored attributes)   Thanks for your help.   Error – Stracktrace:     Unexpected error occurred, please contact your system administrator. Error: Unexpected error occurred, please contact your system administrator.     at new t (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:20:2459)     at o (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:20:3122)     at http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:31:148972     at b (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:31:150927)     at _e.execute (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:67:201841)     at m (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:36:107824)     at E.(anonymous function).O.actDeferSyncAction (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:31:199366)     at E.(anonymous function).O.invokeAction (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:36:107866)     at http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:5:26313     at o (http://localhost:8080/mxclientsystem/mxui/mxui.js?636875548793931215:36:119832)
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1 answers
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Since the answer here (provided by the OP) is in German and this might be useful for others:

Tobias Diederich wrote that one of his colleagues found the cause of the problem. The datagrid in question had “multiselect” enabled. After disabling it, the problem was solved.

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