Device initialization fails: Error 400

[msatpathy26]

With device provisioning enabled, starting aktualizr for the first time fails with the below error.
Never faced this issue with the earlier versions.

root@raspberrypi4:/var/rootdirs/home/root# aktualizr --loglevel 0 -c /var/sota/
Aktualizr version 2020.9-0-gd4811f900 starting
Reading config: "/var/sota/sota.toml"
Final configuration that will be used: 
[logger]
loglevel = 0

[p11]
module = ""
pass = ""
uptane_key_id = ""
tls_ca_id = ""
tls_pkey_id = ""
tls_clientcert_id = ""

[tls]
server = "https://ota-ce.uptanedemo.com:8443"
server_url_path = ""
ca_source = "file"
pkey_source = "file"
cert_source = "file"

[provision]
server = "https://ota-ce.uptanedemo.com:8443"
p12_password = ""
expiry_days = "36000"
provision_path = ""
device_id = ""
primary_ecu_serial = ""
primary_ecu_hardware_id = "raspberrypi4-1"
ecu_registration_endpoint = "https://ota-ce.uptanedemo.com:8443/director/ecus"
mode = "DeviceCred"

[uptane]
polling_sec = 10
director_server = "https://ota-ce.uptanedemo.com:8443/director"
repo_server = "https://ota-ce.uptanedemo.com:8443/repo"
key_source = "file"
key_type = "RSA2048"
force_install_completion = false
secondary_config_file = ""
secondary_preinstall_wait_sec = 600

[pacman]
type = "ostree"
os = ""
sysroot = ""
ostree_server = "https://ota-ce.uptanedemo.com:8443/treehub"
images_path = "/var/sota/images"
packages_file = "/usr/package.manifest"
fake_need_reboot = false

[storage]
type = "sqlite"
path = "/var/sota/"
sqldb_path = "sql.db"
uptane_metadata_path = "metadata"
uptane_private_key_path = "ecukey.der"
uptane_public_key_path = "ecukey.pub"
tls_cacert_path = "root.crt"
tls_pkey_path = "pkey.pem"
tls_clientcert_path = "client.pem"

[import]
base_path = "/var/sota/import"
uptane_private_key_path = ""
uptane_public_key_path = ""
tls_cacert_path = "/var/sota/import/root.crt"
tls_pkey_path = "/var/sota/import/pkey.pem"
tls_clientcert_path = "/var/sota/import/client.pem"

[telemetry]
report_network = true
report_config = true

[bootloader]
rollback_mode = "none"
reboot_sentinel_dir = "/var/run/aktualizr-session"
reboot_sentinel_name = "need_reboot"
reboot_command = "/sbin/reboot"

Current directory: /var/rootdirs/home/root
Bootstrap empty SQL storage
Bootstraping DB to version 25
No public key in db
client_cert not present in db
device_id not present in db
Unable to load previous device ID.
Successfully imported client certificate from "/var/sota/import/client.pem"
Successfully imported server CA certificate from "/var/sota/import/root.crt"
Successfully imported client TLS key from "/var/sota/import/pkey.pem"
No serial found in database for this ECU, defaulting to empty serial
Checking if device is provisioned...
device_id not present in db
No public key in db
post request body:{
        "ecus" : 
        [
                {
                        "clientKey" : 
                        {
                                "keytype" : "RSA",
                                "keyval" : 
                                {
                                        "public" : "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwCyhmvqcauU6Qcs1Eg9z\nkJqT"
                                }
                        },
                        "ecu_serial" : "f092f93ef8c3005bdd96f175f8da716502a46abb8876dd23fe1970d2ef207b7c",
                        "hardware_identifier" : "raspberrypi4-1"
                }
        ],
        "primary_ecu_serial" : "f092f93ef8c3005bdd96f175f8da716502a46abb8876dd23fe1970d2ef207b7c"
}
*   Trying 34.121.161.13:8443...
* Connected to ota-ce.uptanedemo.com (34.121.161.13) port 8443 (#0)
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /tmp/aktualizr-f231-5d19-08a6-696e/8d30-e352-tls-ca
  CApath: /etc/ssl/certs
* SSL connection using TLSv1.2 / ECDHE-ECDSA-AES256-GCM-SHA384
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: CN=ota-gateway
*  start date: Sep 19 08:08:16 2020 GMT
*  expire date: Sep 17 08:08:16 2030 GMT
*  subjectAltName: host "ota-ce.uptanedemo.com" matched cert's "ota-ce.uptanedemo.com"
*  issuer: CN=ota-server-CA
*  SSL certificate verify ok.
> POST /director/ecus HTTP/1.1
Host: ota-ce.uptanedemo.com:8443
User-Agent: Aktualizr/2020.9-0-gd4811f900
Accept: */*
Content-Type: application/json
Content-Length: 732

* upload completely sent off: 732 out of 732 bytes
* Mark bundle as not supporting multiuse
< HTTP/1.1 400 Bad Request
< Server: nginx/1.13.7
< Date: Sat, 19 Sep 2020 12:01:35 GMT
< Content-Type: application/json
< Content-Length: 223
< Connection: keep-alive
< x-ats-version: director-v2/eb75c8bd21b36e7809397cecf9fc652d611e49d3
< 
* Connection #0 to host ota-ce.uptanedemo.com left intact
response http code: 400
response: {"code":"invalid_entity","description":"public-key length is wrong: DownField(83220489075311465645208ed9a65d7d99b45f9d7ab807949ee0ad317c7da0}
Flushing report queue
Initializer error: Server error: Error registering device: 400 {"code":"invalid_entity","description":"public-key length is wrong: DownField(832204890}