Hey Martina.

The obstructions during a form filling can be a technical fault or loss of internet connectivity. You must ensure that there is ample of network connectivity.

There can also be a case of server working slowly because of the rush for filling form at the very moment when you are filling it. In this case you can wait till the time one can expect less rush online.

There can be other technical issues which will be solved after some time. I would suggest you to keep your patience for the while and try again after maybe one or two days. Do respond when your form gets filled successfully.