Trying to upgrade via the Upgrade Wizard 7.5.x > 7.6.1 - at the upload its gets about 32% finished and stops. My php.ini settings are 128M for upload_max_filesize & also for post_max_size. I have restarted Apache2 and also made sure my file permissions were correct on the crm folder.
The weird thing is it has gone through the whole upload a couple times before but the healthcheck threw errors that I needed to fix. I fixed those and again made sure file permissions were ok and apache has restarted.