During process of downloading source, I've had this error, what could cause this?

fatal: the remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed
error: Cannot fetch platform_frameworks_base from https://github.com/GrapheneOS/platform_frameworks_base

Used command to sync:

mkdir grapheneos-14
cd grapheneos-14
repo init -u https://github.com/GrapheneOS/platform_manifest.git -b 14
repo sync -j15

    alexandro I don't know, just guessing. Maybe you were rate limited? Maybe try again with repo sync -j8 like they use in the instructions.

    Also, looks like they know this kind of thing happens so they say just try again:

    If your network is unreliable and repo sync fails, you can run the repo sync command again to continue from where it was interrupted. It handles connection failures robustly and you shouldn't start over from scratch.

      other8026
      Yes could be -j15,
      I will test it with -j8 and share result here