'failed to initialize sparse-checkout

I'm getting the below error when i try to clone a folder "banana" from git repository using sparse filter;

git clone --depth 1 --filter=blob:none --sparse https://github.com/gitexpert/testGithub.git 
cd testGithub
git sparse-checkout set banana

GIT Version : 2.25.1

Error log:

Cloning into 'testGithub'...
fatal: cannot change to '://github.com/gitexpert/testGithub.git': No such file or directory
error: failed to initialize sparse-checkout


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