ZohoOAuthException when trying to fetch access token with Java SDK

ZohoOAuthException when trying to fetch access token with Java SDK

Hello,

I first tried the french documentation which was obsolete. I had to go to the english documentation to have up-to-date information. Or so I thought.
I had to modify the given code. Instead of
ZohoOAuthClient client = ZohoOAuthClient.getInstance();
client.generateAccessToken("generated_grant_token");
I had to write :
ZohoOAuthParams zcrmAuth = new ZohoOAuthParams();
        zcrmAuth.setClientId("(replacing for posting");
        zcrmAuth.setClientSecret("(replacing for posting)");
        zcrmAuth.setRedirectURL("https: //crm.zoho.eu");
        zcrmAuth.setScopes("aaaserver.profile.READ"); //scope for testing access
        ZohoOAuthClient client = ZohoOAuthClient.getInstance(zcrmAuth);
I have created my token from https://api-console.zoho.eu, so I wrote eu everywhere I needed (redirect_uri and domainSuffix). It was hard, but finally I got the reason why it won't work : Instead of json string, I receive a html error page when accessing https://accounts.zoho.eu/oauth/v2/token (tried to replace with com and also error...).

I really need to understand what is wrong. Did I forget something ? Has there been a recent update with the sdk and the documentation is not yet up to date ? Or is the documentation based on an updated SDK ? I am using :
<dependency>
            <groupId>com.zoho.crm</groupId>
            <artifactId>java-sdk</artifactId>
            <version>2.1.2</version>
        </dependency>