SSL Error: ALERT_BAD_CERTIFICATE

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            d3:be:b9:4e:a4:f3:8e:c9
        Signature Algorithm: ecdsa-with-SHA256
        Issuer: O=Juice Technology AG, CN=Juice CA
        Validity
            Not Before: Aug  3 20:14:55 2021 GMT
            Not After : Jul 10 20:14:55 2121 GMT
        Subject: O=Juice Technology AG, CN=Juice Backend
        Subject Public Key Info:
            Public Key Algorithm: id-ecPublicKey
                Public-Key: (384 bit)
                pub:
                    04:73:11:9c:21:bc:5f:23:bb:2d:a6:14:ef:b2:f8:
                    a7:7f:56:9b:e3:b9:4a:f9:bc:0c:4f:2e:53:bf:36:
                    af:84:2a:27:fa:84:d9:65:b8:86:04:78:0c:49:e0:
                    b1:2e:a0:10:d8:72:9e:7a:80:b3:bd:66:4c:76:e5:
                    bc:45:ec:52:04:eb:d6:61:96:32:37:b3:b3:27:e8:
                    38:df:e7:46:26:b5:9c:23:fb:c6:b9:21:eb:a7:6e:
                    e3:16:7c:b1:a1:f4:f4
                ASN1 OID: secp384r1
                NIST CURVE: P-384
        X509v3 extensions:
            X509v3 Subject Alternative Name: 
                DNS:charging.juice-pilot.com, DNS:device.juice-pilot.com
            X509v3 Basic Constraints: critical
                CA:FALSE
            1.3.6.1.4.1.57604.1.1: 
                .=[{"type": 1,"properties": {"capabilities": "Juice Backend"}}]
            1.3.6.1.4.1.57604.1.2: 
                .B[{"type": 1,"properties": {"acl": [{"role": "Juice","id": "*"}]}}]
    Signature Algorithm: ecdsa-with-SHA256
    Signature Value:
        30:66:02:31:00:90:f1:c0:c8:9d:d0:95:86:ef:a8:ed:8f:e5:
        71:38:37:06:20:1d:d1:de:6b:76:58:2a:1c:55:17:87:13:fa:
        be:90:7c:cc:08:20:90:60:21:38:50:4c:ac:79:fa:c7:e4:02:
        31:00:a4:c1:dc:49:df:65:04:2e:e2:29:3f:3c:fa:98:fe:12:
        e1:e3:f1:60:be:d4:98:88:9e:5d:90:32:f3:b2:56:61:a8:ea:
        69:66:dc:58:a2:5a:83:8d:9e:55:09:a1:00:21