Failure during installation of the plugin on.

[sam17]

Logs

2021-03-21 02:58:58,471 > Downloading/unpacking https://github.com/2blane/OctoPrint-Webhooks/archive/master.zip
2021-03-21 02:58:59,975 > Running setup.py (path:/tmp/pip-VCJ9cH-build/setup.py) egg_info for package from https://github.com/2blane/OctoPrint-Webhooks/archive/master.zip
2021-03-21 02:59:01,509 > Found packages: ['octoprint_webhooks']
2021-03-21 02:59:01,510 > 
2021-03-21 02:59:01,511 > warning: no files found matching '*' under directory 'octoprint_webhooks/translations'
2021-03-21 02:59:02,515 > Requirement already satisfied (use --upgrade to upgrade): OctoPrint in /home/pi/Julia2018Octoprint/venv/lib/python2.7/site-packages (from OctoPrint-Webhooks==3.0.3)
2021-03-21 02:59:02,515 > Requirement already satisfied (use --upgrade to upgrade): requests in /home/pi/Julia2018Octoprint/venv/lib/python2.7/site-packages/requests-2.18.4-py2.7.egg (from OctoPrint-Webhooks==3.0.3)
2021-03-21 02:59:02,516 > Downloading/unpacking pillow (from OctoPrint-Webhooks==3.0.3)
2021-03-21 02:59:20,532 > Running setup.py (path:/tmp/pip-build-Rvforl/pillow/setup.py) egg_info for package pillow
2021-03-21 02:59:21,765 > Traceback (most recent call last):
2021-03-21 02:59:21,766 > File "<string>", line 17, in <module>
2021-03-21 02:59:21,766 > File "/tmp/pip-build-Rvforl/pillow/setup.py", line 45
2021-03-21 02:59:21,767 > f"Pillow {PILLOW_VERSION} does not support Python "
2021-03-21 02:59:21,768 > ^
2021-03-21 02:59:21,768 > SyntaxError: invalid syntax
2021-03-21 02:59:21,768 > Complete output from command python setup.py egg_info:
2021-03-21 02:59:21,769 > Traceback (most recent call last):
2021-03-21 02:59:21,770 > 
2021-03-21 02:59:21,771 > File "<string>", line 17, in <module>
2021-03-21 02:59:21,771 > 
2021-03-21 02:59:21,771 > File "/tmp/pip-build-Rvforl/pillow/setup.py", line 45
2021-03-21 02:59:21,772 > 
2021-03-21 02:59:21,772 > f"Pillow {PILLOW_VERSION} does not support Python "

I think latest pillow version has got updated and that breaks the latest package of webhook. It is possible issue is only with python2.7 but I dont have root access on the PI that came with my 3D printer to be able to debug more.

Any ideas?
CC @charutak