Unable to download backup off realm without game crash - java.lang.NullPointerException: Rendering screen

Trying to download a backup off a realm leads to a game crash.

UPDATE: Now unable to open the realms screen/ui from the start screen.

Here is the crash log:

Time: 23/06/20 14:39
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
	at dmh.a(SourceFile:134)
	at dmi.a(SourceFile:42)
	at dmt.a(SourceFile:317)
	at dmv.a(SourceFile:117)
	at dju.a(SourceFile:161)
	at ebs.a(SourceFile:603)
	at dlx.e(SourceFile:1021)
	at dlx.e(SourceFile:654)
	at net.minecraft.client.main.Main.main(SourceFile:215)