Requirement parse error at bootstrapping

[Grustamli]

I am trying to install ILS by running ./scripts/bootstrap. However, the scripts throws below error.

Python version: 3.8.10
Pip version: 21.2.4

Stack trace

Installing collected packages: invenio-app-ils
  Attempting uninstall: invenio-app-ils
    Found existing installation: invenio-app-ils 1.0.0a52
    Uninstalling invenio-app-ils-1.0.0a52:
      Successfully uninstalled invenio-app-ils-1.0.0a52
  Running setup.py develop for invenio-app-ils
Successfully installed invenio-app-ils
Traceback (most recent call last):
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 583, in _build_master
    ws.require(__requires__)
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 900, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 791, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (Flask 2.0.1 (/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages), Requirement.parse('Flask<2.0,>=1.0.4'), {'invenio-base', 'invenio-oaiserver', 'invenio-assets'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/ubuntu/invenioils/invenioils/.venv/bin/ils", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3252, in <module>
    def _initialize_master_working_set():
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3235, in _call_aside
    f(*args, **kwargs)
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3264, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 585, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 598, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 791, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (Flask 2.0.1 (/home/ubuntu/invenioils/invenioils/.venv/lib/python3.8/site-packages), Requirement.parse('Flask<2.0,>=1.0.4'), {'invenio-base', 'invenio-oaiserver', 'invenio-assets'})