Excel custom function not working in Online Excel - reactjs

Question

I have created an excel custom function with a shared runtime environment. It's working fine in the desktop app, but when I run the same project on the server it's not working. My excel function is not working online. I don't know why its behavior change in an online environment.
Can anyone tell me why I am getting making mistakes?
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<OfficeApp xmlns="http://schemas.microsoft.com/office/appforoffice/1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:bt="http://schemas.microsoft.com/office/officeappbasictypes/1.0" xmlns:ov="http://schemas.microsoft.com/office/taskpaneappversionoverrides" xsi:type="TaskPaneApp">
<Id>a1753eec-7c8b-4dbd-ab74-3b30d63d9b15</Id>
<Version>1.0.0.0</Version>
<ProviderName>Contoso</ProviderName>
<DefaultLocale>en-US</DefaultLocale>
<DisplayName DefaultValue="Contoso" />
<Description DefaultValue="Write your own Excel functions in JavaScript." />
<IconUrl DefaultValue="https://localhost:3000/assets/lock.png" />
<HighResolutionIconUrl DefaultValue="https://localhost:3000/assets/lock.png" />
<SupportUrl DefaultValue="https://www.contoso.com/help" />
<AppDomains>
<AppDomain>https://localhost:3000</AppDomain>
</AppDomains>
<Hosts>
<Host Name="Workbook" />
</Hosts>
<Requirements>
<Sets DefaultMinVersion="1.1">
<Set Name="SharedRuntime" MinVersion="1.1" />
</Sets>
</Requirements>
<DefaultSettings>
<SourceLocation DefaultValue="https://localhost:3000/taskpane.html" />
</DefaultSettings>
<Permissions>ReadWriteDocument</Permissions>
<VersionOverrides xmlns="http://schemas.microsoft.com/office/taskpaneappversionoverrides" xsi:type="VersionOverridesV1_0">
<Hosts>
<Host xsi:type="Workbook">
<Runtimes>
<Runtime resid="Taskpane.Url" lifetime="long" />
</Runtimes>
<AllFormFactors>
<ExtensionPoint xsi:type="CustomFunctions">
<Script>
<SourceLocation resid="Functions.Script.Url" />
</Script>
<Page>
<SourceLocation resid="Taskpane.Url" />
</Page>
<Metadata>
<SourceLocation resid="Functions.Metadata.Url" />
</Metadata>
<Namespace resid="Functions.Namespace" />
</ExtensionPoint>
</AllFormFactors>
<DesktopFormFactor>
<GetStarted>
<Title resid="GetStarted.Title" />
<Description resid="GetStarted.Description" />
<LearnMoreUrl resid="GetStarted.LearnMoreUrl" />
</GetStarted>
<FunctionFile resid="Taskpane.Url" />
<ExtensionPoint xsi:type="PrimaryCommandSurface">
<CustomTab id="TabAddIns">
<Group id="CommandsGroup">
<Label resid="CommandsGroup.Label" />
<Icon>
<bt:Image size="16" resid="Icon.16x16" />
<bt:Image size="32" resid="Icon.32x32" />
<bt:Image size="80" resid="Icon.80x80" />
</Icon>
<Control xsi:type="Button" id="TaskpaneButton">
<Label resid="TaskpaneButton.Label" />
<Supertip>
<Title resid="TaskpaneButton.Label" />
<Description resid="TaskpaneButton.Tooltip" />
</Supertip>
<Icon>
<bt:Image size="16" resid="Icon.16x16" />
<bt:Image size="32" resid="Icon.32x32" />
<bt:Image size="80" resid="Icon.80x80" />
</Icon>
<Action xsi:type="ShowTaskpane">
<TaskpaneId>ButtonId1</TaskpaneId>
<SourceLocation resid="Taskpane.Url" />
</Action>
</Control>
</Group>
<Label resid="TaskpaneButton.Label" />
</CustomTab>
</ExtensionPoint>
</DesktopFormFactor>
</Host>
</Hosts>
<Resources>
<bt:Images>
<bt:Image id="Icon.16x16" DefaultValue="https://localhost:3000/assets/lock.png" />
<bt:Image id="Icon.32x32" DefaultValue="https://localhost:3000/assets/lock.png" />
<bt:Image id="Icon.80x80" DefaultValue="https://localhost:3000/assets/lock.png" />
</bt:Images>
<bt:Urls>
<bt:Url id="Functions.Script.Url" DefaultValue="https://localhost:3000/dist/functions.js" />
<bt:Url id="Functions.Metadata.Url" DefaultValue="https://localhost:3000/dist/functions.json" />
<bt:Url id="Functions.Page.Url" DefaultValue="https://localhost:3000/dist/functions.html" />
<bt:Url id="GetStarted.LearnMoreUrl" DefaultValue="https://go.microsoft.com/fwlink/?LinkId=276812" />
<bt:Url id="Commands.Url" DefaultValue="https://localhost:3000/commands.html" />
<bt:Url id="Taskpane.Url" DefaultValue="https://localhost:3000/taskpane.html" />
</bt:Urls>
<bt:ShortStrings>
<bt:String id="Functions.Namespace" DefaultValue="contoso" />
<bt:String id="GetStarted.Title" DefaultValue="Get started with your sample add-in!" />
<bt:String id="CommandsGroup.Label" DefaultValue="Get help" />
<bt:String id="TaskpaneButton.Label" DefaultValue="Login" />
</bt:ShortStrings>
<bt:LongStrings>
<bt:String id="GetStarted.Description" DefaultValue="Your sample add-in loaded succesfully. Go to the HOME tab and click the 'Show Taskpane' button to get started." />
<bt:String id="TaskpaneButton.Tooltip" DefaultValue="Click to Show a Taskpane" />
</bt:LongStrings>
</Resources>
</VersionOverrides>
</OfficeApp>