error in compiling bitbake

[PriyankaR611]

i am getting this error

ERROR: python-flatbuffers-2015.12.22.1-r0 do_fetch: Fetcher failure for URL: 'https://files.pythonhosted.org/packages/source/f/flatbuffers/flatbuffers-2015.12.22.1.tar.gz'. Unable to fetch URL from any source.
ERROR: python-flatbuffers-2015.12.22.1-r0 do_fetch: Function failed: base_do_fetch
ERROR: Logfile of failure stored in: /home/priyanka/Desktop/riscv-poky/build/tmp/work/riscv64-poky-linux/python-flatbuffers/2015.12.22.1-r0/temp/log.do_fetch.15185
ERROR: Task (/home/priyanka/Desktop/riscv-poky/build/../meta-riscv/recipes-devtools/python-extended/python-flatbuffers_2015.12.22.1.bb:do_fetch) failed with exit code '1'

Please suggest any solution for this