Hello Olivier,
Please check that _ssl.pyd, libcrypto-1_1.dll, libssl-1_1.dll files are present in C:/Program Files/Agisoft/Metashape Pro/python/DLLs folder of Metashape Pro installation directory. If they are missing, re-install Metashape Pro.
Then, if the issue still persists, try to copy them to C:/Program Files/Agisoft/Metashape Pro/python/ directory and re-start Metashape.