Adding a SimplePlanningCalendar to a UI5 app fails with `getKey` error - sapui5

Question

When I add a SimplePlanningCalendar to my app, I got the following Error.
I added the calendar with a minimal configuration to my app.
<IconTabBar xmlns="sap.m"
id="idCategoryMenu"
selectedKey="Home"
headerMode="Inline"
stretchContentHeight="true"
applyContentPadding="false"
select=".onSelectCategory"
items="{
path: 'backend>/CategorySet',
parameters: {
expand: 'Reports'
},
sorter: {
path: 'Sort'
},
templateShareable: true
}">
<items>
<IconTabFilter id="myIconTabFilter" key="{backend>Uuid}" text="{backend>Name}">
<!-- ... -->
<SinglePlanningCalendar>
<appointments>
<unified:CalendarAppointment xmlns:unified="sap.ui.unified"
title="{title}"
startDate="{startDate}"
endDate="{endDate}"
/>
</appointments>
</SinglePlanningCalendar>
<!-- ... -->
</IconTabFilter>
</items>
</IconTabBar>
When I debug the app, I come to the following line inside the SinglePlanningCalendar.js where a key from the given vView parameter is requested, but the parameter only holds a string.
Anyone else had this problem before and knows why or how to solve this?

Answer 1

The problem is caused by the control implementation itself in the current version (1.71.21) I use for my development.
The fix in the commit 45696fe is available as of UI5 1.75.x.
Since I cannot change my version, I implemented the given solution in my package:
{ // Controller
onInit: function () {
// ...
this.calendarTemporaryFix(); // Not needed since UI5 1.75
},
calendarTemporaryFix: function () {
// SinglePlanningCalendar required from "sap/m/SinglePlanningCalendar"
const fnSetSelectedView = SinglePlanningCalendar.prototype.setSelectedView;
SinglePlanningCalendar.prototype.setSelectedView = function (vView) {
if (typeof vView === "string") {
vView = sap.ui.getCore().byId(vView);
}
return fnSetSelectedView.call(this, vView);
};
},
// ...
}