SSR error appears on each page: TypeError: Cannot read properties of undefined (reading 'userAgent')

[tdonohue]

Describe the bug
After merging #2976, any time you run the UI in production mode, the following Server-side rendering error occurs:

ERROR TypeError: Cannot read properties of undefined (reading 'userAgent')
    at RootComponent2.getBrowserName (C:\dspace-angular\dist\server\main.js:1:1008203)
    at RootComponent2.ngOnInit (C:\dspace-angular\dist\server\main.js:1:1006659)
    at callHookInternal (C:\dspace-angular\dist\server\main.js:1:4136369)
    at callHook (C:\dspace-angular\dist\server\main.js:1:4136729)
    at callHooks (C:\dspace-angular\dist\server\main.js:1:4136119)
    at executeInitAndCheckHooks (C:\dspace-angular\dist\server\main.js:1:4135456)
    at refreshView (C:\dspace-angular\dist\server\main.js:1:4207799)
    at detectChangesInView$1 (C:\dspace-angular\dist\server\main.js:1:4211075)
    at detectChangesInViewIfAttached (C:\dspace-angular\dist\server\main.js:1:4210634)
    at detectChangesInEmbeddedViews (C:\dspace-angular\dist\server\main.js:1:4210339)

The issue appears to be on this line: https://github.com/DSpace/dspace-angular/blob/main/src/app/root/root.component.ts#L147

To Reproduce
Steps to reproduce the behavior:

1. Start the UI in production mode: yarn install; yarn build:prod; yarn serve:ssr
2. Access the homepage (or any page). In the console where you ran yarn serve:ssr, you'll see the above TypeError.

[tdonohue]

@davide-negretti : This is a bug that is caused by #2976. It's likely a simple fix. If you have time to work on a PR, I'd appreciate it.

[tdonohue]

Nevermind, I figured out the fix myself. It was simple after all. See #3004