New version of Nextcloud app on IOS

Yesterday, I have a new version of the nextcloud app on IOS, but after the installation of this new version I am not able to login. Every time I get the following message:

We have detected multiple invalid login attempts from your IP. Therefore your next login is throttled up to 30 seconds.

The nextcloud server is based on version 16.0.4
The iPad is running on IOS 12.4.1
nextcloud app for IOS

Please, van you advise to get ris of this message?