Cannot install (again)

[av01d]

I am trying (for a second time) to get this software to work. When running python3 -m pip install -r requirements.txt a lot of stuff is installed, but it finally fails with these messages:

ERROR: Cannot install requests==2.24.0 and urllib3==1.26.5 because these package versions have conflicting dependencies.

The conflict is caused by:
    The user requested urllib3==1.26.5
    requests 2.24.0 depends on urllib3!=1.25.0, !=1.25.1, <1.26 and >=1.21.1

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies

I am not very good in Python... any ideas on how to fix these installation issues?