stuck with this from past one hour

1. trying to install tailwind css in ubuntu 20.04.4
2. had install (npm 6.14.4) and (node v10.19.0)
3. nvm 0.39.1
   throwing following error

ohit@rohit-system:~/Desktop/my-Tailwind-directory$ nvm install 18.17.0
Downloading and installing node v18.17.0…
Downloading https://nodejs.org/dist/v18.17.0/node-v18.17.0-linux-x64.tar.xz…
Warning: Failed to open the file
Warning: /home/rohit/.my_custom_nvm/.cache/bin/node-v18.17.0-linux-x64/node-v18
Warning: .17.0-linux-x64.tar.xz: Permission denied
0.2%curl: (23) Failure writing output to destination

Binary download from https://nodejs.org/dist/v18.17.0/node-v18.17.0-linux-x64.tar.xz failed, trying source.
grep: /home/rohit/.my_custom_nvm/.cache/bin/node-v18.17.0-linux-x64/node-v18.17.0-linux-x64.tar.xz: No such file or directory
Provided file to checksum does not exist.
Binary download failed, trying source.
Downloading https://nodejs.org/dist/v18.17.0/node-v18.17.0.tar.xz…
Warning: Failed to open the file
Warning: /home/rohit/.my_custom_nvm/.cache/src/node-v18.17.0/node-v18.17.0.tar.
Warning: xz: Permission denied
0.0%curl: (23) Failure writing output to destination

Binary download from https://nodejs.org/dist/v18.17.0/node-v18.17.0.tar.xz failed, trying source.
grep: /home/rohit/.my_custom_nvm/.cache/src/node-v18.17.0/node-v18.17.0.tar.xz: No such file or directory
Provided file to checksum does not exist.