v4: Fix HandleErrorFunction type (#1829) #2120

Job	Run time
typecheck / typecheck	5m 3s
units / 🧪 Unit Tests	11m 10s
publish-worker / build (coordinator)	1m 57s
publish-webapp / publish	2m 51s
publish-worker / build (docker-provider)	46s
publish-worker / build (kubernetes-provider)	39s
	22m 26s

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