Error when trying to conda install pip

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I’m using anaconda navigator and I had previously installed a new environment successfully but now having an error when trying to install a new one. The following happens:

After creating and activating a new Environment in anaconda prompt I run “conda install pip” and I get the following error:

Error while loading conda entry point: conda-content-trust (DLL load failed while importing _rust: Impossível localizar o módulo especificado.)
Error while loading conda entry point: conda-libmamba-solver (DLL load failed while importing bindings: Impossível localizar o módulo especificado.)
CondaValueError: You have chosen a non-default solver backend (libmamba) but it was not recognized. Choose one of: classic

I have tried to run:

“conda update conda”
and I get:

Error while loading conda entry point: conda-content-trust (DLL load failed while importing _rust: Impossível localizar o módulo especificado.)
Error while loading conda entry point: conda-libmamba-solver (DLL load failed while importing bindings: Impossível localizar o módulo especificado.)
PackageNotInstalledError: Package is not installed in prefix.
package name: conda

conda config --set solver “classic”
and I get:

Error while loading conda entry point: conda-content-trust (DLL load failed while importing _rust: Impossível localizar o módulo especificado.)
Error while loading conda entry point: conda-libmamba-solver (DLL load failed while importing bindings: Impossível localizar o módulo especificado.)

conda config --set solver “classic”
and I get:

Error while loading conda entry point: conda-content-trust (DLL load failed while importing _rust: Impossível localizar o módulo especificado.)
Error while loading conda entry point: conda-libmamba-solver (DLL load failed while importing bindings: Impossível localizar o módulo especificado.)

Any idea? Thanks!