Hi Nasim,
It is unlikely that the issue would lie with the server setup, especially since you get no error from uploading, and locally-downloaded zip files are also corrupted. I edited part of the code of the MediaRecorder element, including bits here and there concerning the zipping of the recordings, but I can’t tell whether those edits are directly related to the present issue
I am glad to read that the latest version of PennController solves the issue though!
Jeremy