WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz: BAD signature

WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz: BAD signature
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz: BAD signature
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz: BAD signature
ERROR: unsatisfiable constraints:
openssl (missing):
required by: world[openssl]
ERROR: Service 'nginx' failed to build : The command '/bin/sh -c apk add --no-cache openssl && chmod -R g=u /var/cache/nginx && mkdir /var/run/defectdojo && chmod -R g=u /var/run/defectdojo && mkdir -p /etc/nginx/ssl && chmod -R g=u /etc/nginx && true' returned a non-zero code: 1

I have restarted the docker but still the error repeats