I am trying to run provided sample but its not running and giving dependency error

[testantech]

I am trying to run provided sample but its not running and giving dependency error , following are the error i am getting although all the required dependency are already added in build gradle but still getting following issue. kindly let me know whats the issue..
i am trying this
Run
cd encoding
./gradlew run

Could not resolve all files for configuration ':compileClasspath'.

Could not resolve io.emeraldpay.polkaj:polkaj-scale:0.5.0-SNAPSHOT.
Required by:
project :
> Could not resolve io.emeraldpay.polkaj:polkaj-scale:0.5.0-SNAPSHOT.
> Unable to load Maven meta-data from https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-scale/0.5.0-

SNAPSHOT/maven-metadata.xml.
> Could not get resource 'https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-scale/0.5.0-SNAPSHOT/maven-metadata.xml'.
> Could not GET 'https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-scale/0.5.0-SNAPSHOT/maven-metadata.xml'. Received status code 403 from server: Forbidden

Could not resolve io.emeraldpay.polkaj:polkaj-common-types:0.5.0-SNAPSHOT.
Required by:
project :
> Could not resolve io.emeraldpay.polkaj:polkaj-common-types:0.5.0-SNAPSHOT.
> Unable to load Maven meta-data from https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-common-types/0.5.0-SNAPSHOT/maven-metadata.xml.
> Could not get resource 'https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-common-types/0.5.0-SNAPSHOT/maven-metadata.xml'.
> Could not GET 'https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-common-types/0.5.0-SNAPSHOT/maven-metadata.xml'. Received status code 403 from server: Forbidden
Could not resolve io.emeraldpay.polkaj:polkaj-ss58:0.5.0-SNAPSHOT.
Required by:
project :
> Could not resolve io.emeraldpay.polkaj:polkaj-ss58:0.5.0-SNAPSHOT.
> Unable to load Maven meta-data from https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-ss58/0.5.0-SNAPSHOT/maven-metadata.xml.
> Could not get resource 'https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-ss58/0.5.0-SNAPSHOT/maven-metadata.xml'.
> Could not GET 'https://dl.bintray.com/emerald/polkaj/io/emeraldpay/polkaj/polkaj-ss58/0.5.0-SNAPSHOT/maven-metadata.xml'. Received status code 403 from server: Forbidden

Addede dependency
dependencies {
implementation "io.emeraldpay.polkaj:polkaj-scale:$polkajVersion"
implementation "io.emeraldpay.polkaj:polkaj-common-types:$polkajVersion"
implementation "io.emeraldpay.polkaj:polkaj-ss58:$polkajVersion"
implementation 'commons-codec:commons-codec:1.14'
}