Seahub failed to start, no module named 'imp'

Hi was just trying to set up a seafile server on an old laptop and was following a guide from i12bretro (see link in the comments) but once I run the commend ./seahub.sh start I get the following message:

LC_ALL is not set in ENV, set to en_US.UTF-8
Starting seahub at port 8000 ...
Traceback (most recent call last):
  File "/opt/seafile/seafile-server-9.0.0/check_init_admin.py", line 19, in <module>
    from seaserv import ccnet_api
  File "/opt/seafile/seafile-server-9.0.0/seafile/lib/python3/site-packages/seaserv/__init__.py", line 1, in <module>
    from . import service
  File "/opt/seafile/seafile-server-9.0.0/seafile/lib/python3/site-packages/seaserv/service.py", line 9, in <module>
    import seafile
  File "/opt/seafile/seafile-server-9.0.0/seafile/lib/python3/site-packages/seafile/__init__.py", line 1, in <module>
    from .rpcclient import SeafServerThreadedRpcClient as ServerThreadedRpcClient
  File "/opt/seafile/seafile-server-9.0.0/seafile/lib/python3/site-packages/seafile/rpcclient.py", line 1, in <module>
    from pysearpc import searpc_func, SearpcError, NamedPipeClient
  File "/opt/seafile/seafile-server-9.0.0/seafile/lib/python3/site-packages/pysearpc/__init__.py", line 5, in <module>
    from .named_pipe import NamedPipeServer, NamedPipeClient
  File "/opt/seafile/seafile-server-9.0.0/seafile/lib/python3/site-packages/pysearpc/named_pipe.py", line 5, in <module>
    from future import standard_library
  File "/opt/seafile/seafile-server-9.0.0/seahub/thirdpart/future/standard_library/__init__.py", line 65, in <module>
    import imp
ModuleNotFoundError: No module named 'imp'

I found an older post on this forum where they suggested changing the name of the folder but I can’t seem to figure out which folder I have to change.

Srry if this is a stupid question. but I am a beginner and a bit overwhelmed by the amount of different guides and information online.
Thx in advance for your answers.

link to the guide:

https://i12bretro.github.io/tutorials/0643.html