Problem in proxing 3rd docker proxy using nexus

I am trying to proxy a 3rd docker repository ( instead of using the nexus repo manager. the problem is when I try to use “docker pull nexus_server:port/nginx/nginx” to pull the image, I get " Error response from daemon: manifest for not found: manifest unknown: manifest unknown" message and the following message in the nexus log.
“2021-12-20 15:21:05,508+0330 WARN [qtp560412956-8662] admin - Error: HEAD /v2/nginx/nginx/manifests/latest
java.lang.IllegalArgumentException: Digest must be formed as ‘alg:hex’: 13af0f-3573-61be3fd7”
But I can easily pull the image with the " docker pull" command. Could anyone give me an advice to solve the problem?