Mamba stalls on creating environment from yaml on Ubuntu 22 EC2 instance that works perfectly on local machine

I am trying to spin up a Python web application on an AWS EC2 instance running Ubuntu 22. I am using mamba as a package manager and have the packages written into an environment.yml file. Running mamba env create --file=environment.yml works perfectly for creating a virtual environment (and running the app) on my local machine. However, on my new EC2 instance, the process stops after printing Looking for: ['python=3.11', 'langchain', 'openai', 'tiktoken', 'pandas', 'streamlit', 'pip'] and then waiting about 5 seconds. I don't know if the issue is coming from something related to Ubuntu, EC2, or mamba and I am unsure how to troubleshoot this.

The entirety of commands run on this instance so far:

# download and install mamba curl -L -O "https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-$(uname)-$(uname -m).sh"bash Mambaforge-$(uname)-$(uname -m).shgit clone https://github.com/username/repomamba env create --file=environment.yml

The contents of environment.yml

name: environment-namechannels:  - conda-forge  - nodefaultsdependencies:  - python=3.11  - langchain  - openai  - tiktoken  - pandas  - streamlit  - pip  - pip:    - streamlit-authenticator