Hi @edgar_ramirez_mondragon I have installed plugins already. Although, I tried to reinstall the meltano with

source .venv/bin/activate
pip3 install meltano

and got the same error about schema. ---------------------------------------------- (.venv) azureuser@Airbyte:~/meltano-projects$ pip3 install meltano Requirement already satisfied: WTForms in ./.venv/lib/python3.8/site-packages (from Flask-WTF>=0.13.1->meltano-flask-security<0.2.0,>=0.1.0->meltano) (3.0.0) ERROR: singer-python 5.9.0 has requirement jsonschema==2.6.0, but you'll have jsonschema 3.2.0 which is incompatible. ERROR: singer-python 5.9.0 has requirement simplejson==3.11.1, but you'll have simplejson 3.17.6 which is incompatible. Installing collected packages: jsonschema, simplejson, itsdangerous Attempting uninstall: jsonschema Found existing installation: jsonschema 2.6.0 Uninstalling jsonschema-2.6.0: Successfully uninstalled jsonschema-2.6.0 Attempting uninstall: simplejson Found existing installation: simplejson 3.11.1 Uninstalling simplejson-3.11.1: Successfully uninstalled simplejson-3.11.1 Attempting uninstall: itsdangerous Found existing installation: itsdangerous 2.0.1 Uninstalling itsdangerous-2.0.1: Successfully uninstalled itsdangerous-2.0.1 Successfully installed itsdangerous-1.1.0 jsonschema-3.2.0 simplejson-3.17.6