PHRAS-4067: admin - dashboard - 500 error #940

Job	Run time
build phraseanet-nginx / build	2m 45s
build phraseanet-fpm / build	3m 39s
build phraseanet-elasticsearch / build	41s
build phraseanet-db / build	20s
build phraseanet-setup / build	3m 36s
build phraseanet-worker / build	3m 41s
unit test	5m 52s
	20m 34s

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