Fix Python agent read when an error is raised #2588

Job	Run time
Unit tests (Runtime)	6m 22s
CLI End to End tests	9m 33s
End to End tests (Python, python)	19m 20s
End to End tests (Other, other)	19m 6s
Unit tests (Runtime IT)	17m 57s
Unit tests (Deployer)	8m 16s
Unit tests (Api Gateway)	4m 25s
Unit tests (Control plane)	4m 32s
Unit tests (Other)	12m 3s
Unit tests (Style)	4m 7s
	1h 45m 41s

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