Thank you for all your answers. What I did is come back to the original path and modify the config file to make it working. Now wallets are loaded with the flag -walletdir=.../testnet3/wallets.

I still don't know why it doesn't work before but now it works. I'm still strugling with bitcoin-cli because he doesn't want to read config file in PATH. Rather than bitcoind is running correctly into this path...


I hope to find the problem soon. Thanks again everyone for your answer.