Access error to repo directories

When I try to access a branch or directory in a branch I get the following error:

Looks like something went wrong!

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Also when I try to push an update I get an error.

Enumerating objects: 5, done.
Counting objects: 100% (5/5), done.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (3/3), 373 bytes | 373.00 KiB/s, done.
Total 3 (delta 2), reused 0 (delta 0), pack-reused 0
remote: Resolving deltas: 100% (2/2), completed with 2 local objects.
remote: fatal: did not receive expected object 253dc152435560189ae84c3ca2435deb5b00ce55
To github.com:huaraz/tinyproxy.git
! [remote rejected] mm-dns → mm-dns (failed)
error: failed to push some refs to ‘git@github.com:huaraz/tinyproxy.git’

The object is a directory in the branch.

Is this a github service issue ?

Thank you
Markus