error debian 8.11 - sct 4.2.1

--
Spinal Cord Toolbox (4.2.1)

SCT info:
- version: 4.2.1
- path: /home/alex/sct_4.2.1
OS: linux (Linux-3.16.0-6-amd64-x86_64-with-debian-8.11)
CPU cores: Available: 4, Used by SCT: 4
RAM: MemTotal:        4058416 kB
total       used       free     shared    buffers     cached
Mem:          3963       3187        775         28         97       2237
-/+ buffers/cache:        853       3110
Swap:          879          0        879
Check Python executable.............................[OK]
  Using bundled python 3.6.10 |Anaconda, Inc.| (default, Jan  7 2020, 21:14:29) 
[GCC 7.3.0] at /home/alex/sct_4.2.1/python/envs/venv_sct/bin/python
Check if data are installed.........................[OK]
Check if numpy is installed.........................[OK] (1.17.4)
Check if cryptography is installed..................[OK] (2.8)
Check if dipy is installed..........................[OK] (1.0.0)
Check if futures is installed.......................[OK]
Check if h5py is installed..........................[OK] (2.10.0)
Check if Keras is installed.........................generated new fontManager
[OK] (2.3.1)
Check if matplotlib is installed....................[OK] (3.1.2)
Check if nibabel is installed.......................[OK] (3.0.0)
Check if pandas is installed........................[OK] (0.25.3)
Check if psutil is installed........................[OK] (5.6.7)
Check if pyqt5 (5.11.3) is installed................[OK]
Check if pytest is installed........................[OK] (5.3.2)
Check if pytest-cov is installed....................[OK] (2.8.1)
Check if raven is installed.........................[OK]
Check if requests is installed......................[OK] (2.22.0)
Check if scipy is installed.........................[OK] (1.4.0)
Check if scikit-image is installed..................[FAIL]
dlopen: cannot load any more object with static TLS
It seems that scikit-image has not been built correctly.

Your install of scikit-image appears to be broken.
Try re-installing the package following the instructions at:
https://scikit-image.org/docs/stable/install.html 
Check if scikit-learn is installed..................[FAIL]
dlopen: cannot load any more object with static TLS
___________________________________________________________________________
Contents of /home/alex/sct_4.2.1/python/envs/venv_sct/lib/python3.6/site-packages/sklearn/__check_build:
__init__.py               _check_build.cpython-36m-x86_64-linux-gnu.sosetup.py
__pycache__
___________________________________________________________________________
It seems that scikit-learn has not been built correctly.

If you have installed scikit-learn from source, please do not forget
to build the package before using it: run `python setup.py install` or
`make` in the source directory.

If you have used an installer, please check that it is suited for your
Python version, your operating system and your platform.
Check if tensorflow is installed....................[OK] (2.0.0)
Check if xlrd is installed..........................[OK] (1.2.0)
Check if xlutils is installed.......................[OK]
Check if xlwt is installed..........................[OK] (1.3.0)
Check if tqdm is installed..........................[OK] (4.40.2)
Check if transforms3d is installed..................[OK] (0.3.1)
Check if urllib3[secure] is installed...............[OK] (1.25.7)
Check if spinalcordtoolbox is installed.............[OK]
Check ANTs compatibility with OS ...................[OK]
Check PropSeg compatibility with OS ................[OK]
Check if DISPLAY variable is set....................[OK]
Check if figure can be opened with PyQt.............Traceback (most recent call last):
  File "/home/alex/sct_4.2.1/scripts/sct_check_dependencies.py", line 379, in <module>
    main()
  File "/home/alex/sct_4.2.1/scripts/sct_check_dependencies.py", line 356, in main
    from PyQt5.QtWidgets import QApplication, QLabel
ImportError: dlopen: cannot load any more object with static TLS

Installation validation Failed!

Please copy the historic of this Terminal (starting with the command install_sct) and paste it in the SCT Help forum (create a new discussion):

http://forum.spinalcordmri.org/c/sct


Installation failed