Failed to connect to Redis (using redis-plus-plus) - c++

Question

So I installed Redis in OpenSuse 15.0 and everything was working well. I was using redis-cli for checking the communication with redis server and it was ok.
I wanted to use redis-plus-plus as I'm coding in C++. Installation was succesfully as it passed all tests.
But then I created my own script (inside general redis-plus-plus folder) with the following code:
#include <sw/redis++/redis++.h>
#include <iostream>
#include <unordered_set>
using namespace sw::redis;
int main()
{
// Create an Redis object, which is movable but NOT copyable.
auto redis = Redis("tcp://127.0.0.1:6379");
redis.set("key", "val");
}
It's a very simple code, just to check that connection was succesfully.
And I was compiling it as follows:
/usr/bin/g++-10 -std=c++17 -o main main.cpp /home/user/redis-plus-plus/test/libredis++.a /home/user/hiredis/build/libhiredis_static.a -pthread
Compilation was ok, but when I execute the ./main I'm getting the following error:
terminate called after throwing an instance of 'sw::redis::Error'
what(): unknown error code: Failed to connect to Redis:
Abortado (`core' generado)
And I have another window with the server running, so I don't know why I can't connect with Redis server and I don't know what else can I try... The problem is with the line
redis.set("key", "val");
because if I remove this line I have no error. Any help will be deeply apreciated, thanks!
UPDATE: The problem above was solved, now I'm facing something similar. I'm trying to implement two more lines:
#include <sw/redis++/redis++.h>
#include <iostream>
using namespace sw::redis;
int main()
{
auto redis = Redis("tcp://127.0.0.1:6379");
redis.set("key", "new_val270622");
auto redis_cluster = RedisCluster("tcp://127.0.0.1:16379");
redis_cluster.set("key", "new_val");
}
And I'm getting this error:
CLUSTERDOWN The cluster is down
If I do
ss -tulpn
I get the following ports:
In redis.config I have made the following changes:
cluster-enabled yes
cluster-config-file nodes-16379.conf
cluster-require-full-coverage yes
And I also used:
redis-cli --cluster fix 127.0.0.1:6379
What am I doing wrong? Thank you so much!!!!