Hello Nakul,
What should I do?
These are often temporary failures.
I would try again using the GetComponents command. The only change I would suggest would be to use --no-parallel to avoid any potential issues of a server/proxy being overloaded.
I.e., in the same location you ran GetComponents before, run (assuming you downloaded the release version of the toolkit):
./GetComponents --no-parallel https://bitbucket.org/einsteintoolkit/manifest/raw/ET_2021_11/einsteintoolki...
you can try both "yes" and "no" answers to the question about updating existing checkouts though I would start with "no" (exactly which one is best depends on where in the process exactly the checkout failed before).
Yours, Roland