Fresh install auto-reload makes things unuseable

Dear all,
I’ve just set up a fresh install on my own debian server with PHP7.

After installation and logging in there’s an auto-reload happening every 2 seconds. Independently on where I am within the system. If I manage to be fast enough to switch from the dashboard to “Sales / Accounts” for example another 2 seconds later I’m back on the dashboard due to the auto-reload.

This makes the whole thing pretty much unuseable. And it’s annoying as hell, to say the least :wink:

Any hint would be highly appreciated! And yes I did make a search here but couldn’t find a helpful answer.