SSL Error: TLSV1_ALERT_PROTOCOL_VERSION

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            03:58:95:31:bc:f5:b5:f7:11:9d:47:02:4b:e5:b5:18:75:36
        Signature Algorithm: ecdsa-with-SHA384
        Issuer: C=US, O=Let's Encrypt, CN=E5
        Validity
            Not Before: Feb  5 09:39:00 2025 GMT
            Not After : May  6 09:38:59 2025 GMT
        Subject: CN=nc.datacu.be
        Subject Public Key Info:
            Public Key Algorithm: id-ecPublicKey
                Public-Key: (256 bit)
                pub:
                    04:df:7f:e4:36:7a:5a:91:56:26:be:ac:e1:98:97:
                    fb:f3:05:79:66:31:f3:8f:b9:43:72:d3:ed:a8:1a:
                    b7:4d:27:99:46:27:aa:be:83:30:60:04:3f:65:0e:
                    29:ed:92:f0:1e:e9:f5:89:eb:37:c6:aa:37:c6:ae:
                    1d:8a:53:7e:ad
                ASN1 OID: prime256v1
                NIST CURVE: P-256
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature
            X509v3 Extended Key Usage: 
                TLS Web Server Authentication, TLS Web Client Authentication
            X509v3 Basic Constraints: critical
                CA:FALSE
            X509v3 Subject Key Identifier: 
                E2:96:A3:90:E2:49:67:BA:F8:BF:7E:AB:57:7D:FA:21:1C:51:FF:0F
            X509v3 Authority Key Identifier: 
                9F:2B:5F:CF:3C:21:4F:9D:04:B7:ED:2B:2C:C4:C6:70:8B:D2:D7:0D
            Authority Information Access: 
                OCSP - URI:http://e5.o.lencr.org
                CA Issuers - URI:http://e5.i.lencr.org/
            X509v3 Subject Alternative Name: 
                DNS:d.atacube.de, DNS:datacu.be, DNS:nc.d.atacube.de, DNS:nc.datacu.be
            X509v3 Certificate Policies: 
                Policy: 2.23.140.1.2.1
            CT Precertificate SCTs: 
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : 13:4A:DF:1A:B5:98:42:09:78:0C:6F:EF:4C:7A:91:A4:
                                16:B7:23:49:CE:58:57:6A:DF:AE:DA:A7:C2:AB:E0:22
                    Timestamp : Feb  5 10:37:30.386 2025 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:46:02:21:00:EE:06:76:4F:1F:AE:A8:9A:CB:B9:B7:
                                8E:B1:E7:24:58:71:C8:43:3D:95:B5:A8:2E:58:81:7B:
                                1C:16:8B:1B:77:02:21:00:E2:B6:AC:AD:12:5B:56:56:
                                60:9A:80:EE:F9:83:AD:0A:93:39:18:FB:DE:50:34:DB:
                                A8:86:EF:E3:E3:71:B1:40
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : DE:85:81:D7:50:24:7C:6B:CD:CB:AF:56:37:C5:E7:81:
                                C6:4C:E4:6E:D6:17:63:9F:8F:34:A7:26:C9:E2:BD:37
                    Timestamp : Feb  5 10:37:30.182 2025 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:44:02:20:17:5B:30:C2:00:82:8C:03:FE:0C:05:0B:
                                7A:A6:3A:83:61:EA:26:A7:79:E3:18:51:00:29:7F:01:
                                88:81:EA:1D:02:20:61:9F:97:05:C2:CF:3B:93:AB:1E:
                                AA:EC:C5:EF:7E:5F:D9:5D:93:6A:78:6C:76:75:AF:91:
                                B1:92:15:B7:97:0D
    Signature Algorithm: ecdsa-with-SHA384
    Signature Value:
        30:65:02:31:00:f5:81:34:ce:b5:1d:70:ef:1d:d9:35:de:90:
        90:87:67:fe:ac:93:7d:42:e5:a1:f1:3f:d9:72:3a:22:76:3e:
        e6:e4:ce:94:19:dc:f5:0d:1c:bb:22:a7:19:af:0f:b5:ee:02:
        30:58:95:59:15:cb:23:14:91:f1:f5:27:7e:64:03:10:7c:b4:
        c9:ed:6a:d2:eb:6a:45:4b:cb:dd:8c:b5:e9:85:e4:b0:d9:7e:
        dc:04:b3:5a:5d:4d:9b:cb:06:52:c4:58:55