What is the problem?
Warning messages during plugin install
Installing plugin "UI Customizer" from https://github.com/LazeMSS/OctoPrint-UICustomizer/archive/main.zip...
Same messages with some plugin install.
What did you already try to solve it?
Have you tried running in safe mode and if so did it solve the issue?
/home/pi/oprint/local/lib/python2.7/site-packages/OpenSSL/crypto.py:14: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in a future release.
from cryptography import utils, x509
Additional information about your setup
OctoPrint : 1.5.0 on RPI4 4Go Linux octopi 5.4.79-v7l+ #1373 SMP Mon Nov 23 13:27:40 GMT 2020 armv7l Linux octopi 5.4.79-v7l+ #1373 SMP Mon Nov 23 13:27:40 GMT 2020 armv7l
OctoPrint version : 1.5.0
OctoPi version : 0.17.0