Serialization Error using Corda Docker Image

I get the following error (for each node), when I run the command docker-compose up. I configured the network parameters myself as well as the nodes, not using the network bootstrapper.

[ERROR] 08:07:48+0000 [main] internal.NodeStartupLogging.invoke - Exception during node startup: Serialization scheme ([6D696E696D756D], P2
P) not supported. [errorCode=1e6peth, moreInformationAt=https://errors.corda.net/OS/4.0/1e6peth]

I have tried to change the properties in the network-parameters file, yet unsuccessfully so far.

Here are my config files:

myLegalName : "O=Notary, L=London, C=GB"
p2pAddress : "localhost:10008"
devMode : true
notary : {
    validating : false
}
rpcSettings = {
    address : "notary:10003"
    adminAddress : "notary:10004"
}
rpcUsers=[
    {
        user="user"
        password="test"
        permissions=[
            ALL
        ]
    }
]
detectPublicIp : false
myLegalName : "O=PartyA, L=London, C=GB"
p2pAddress : "localhost:10005"
devMode : true
rpcSettings = {
    address : "partya:10003"
    adminAddress : "partya:10004"
}
rpcUsers=[
    {
        user=corda
        password=corda_initial_password
        permissions=[
            ALL
        ]
    }
]
detectPublicIp : false
myLegalName : "O=PartyB, L=London, C=GB"
p2pAddress : "localhost:10006"
devMode : true
rpcSettings = {
    address : "partyb:10003"
    adminAddress : "partyb:10004"
}
rpcUsers=[
    {
        user=corda
        password=corda_initial_password
        permissions=[
            ALL
        ]
    }
]
detectPublicIp : false

as well as my network-parameters file and my docker-compose.yml file:

minimumPlatformVersion=4
notaries=[NotaryInfo(identity=O=Notary, L=London, C=GB, validating=false)]
maxMessageSize=10485760
maxTransactionSize=524288000
whitelistedContractImplementations {

}
eventHorizon="30 days"
epoch=1


version: '3.7'
services:
  Notary:
    image: corda/corda-zulu-4.0:latest
    container_name: Notary
    networks:
      - corda
    volumes:
      - ./nodes/notary_node.conf:/etc/corda/node.conf
      - ./nodes/network-parameters:/opt/corda/network-parameters

  PartyA:
    image: corda/corda-zulu-4.0:latest
    container_name: PartyA
    networks:
      - corda
    volumes:
      - ./nodes/partya_node.conf:/etc/corda/node.conf
      - ./nodes/network-parameters:/opt/corda/network-parameters
      - ./build/libs/:/opt/corda/cordapps

  PartyB:
    image: corda/corda-zulu-4.0:latest
    container_name: PartyB
    networks:
      - corda
    volumes:
      - ./nodes/partyb_node.conf:/etc/corda/node.conf
      - ./nodes/network-parameters:/opt/corda/network-parameters
      - ./build/libs/:/opt/corda/cordapps

networks:
  corda:

Many thanks in advance for your help!

Source: StackOverflow