"[Temporal/Spectral Profile Tool][1]"-plugin runs into a Python error (below: reports import error in last two lines, entire error message is 14 lines):

QGIS 3.16.13 on mac 10.15.7, running Qt 5.14.2, QWT 6.1.4.
In QGIS 3.10 the plugin runs properly. 

I haven't found any earlier posts on this issue.


Error message:

    _import
      mod = _builtin_import(name, globals, locals, fromlist, level)
      ImportError: dlopen(/Applications/QGIS-LTR.app/Contents/MacOS/lib/python3.8/site-packages/Pillow-7.2.0-py3.8-macosx-10.13.0-x86_64.egg/PIL/_imaging.cpython-38-darwin.so, 2): Library not loaded: /opt/X11/lib/libxcb.1.dylib
      Referenced from: /Applications/QGIS-LTR.app/Contents/MacOS/lib/python3.8/site-packages/Pillow-7.2.0-py3.8-macosx-10.13.0-x86_64.egg/PIL/_imaging.cpython-38-darwin.so
      Reason: image not found

  [1]: https://plugins.qgis.org/plugins/temporalprofiletool/