Installing Horde Groupware

Anyone that have made Horde work with PHP 7.3 on Nethserver? I have been using Horde for years and also my users so I’m searching for a solution. I have also tried the steps described here: https://community.nethserver.org/t/horde-issues-before-to-release/17141/9. But I’m completly stuck on getting activesync to work. It throws an 401 error with username/password is wrong. Even with debug set in log level there is not enough information find out whats wrong. The exact same conf-file for activesync works with php 5.4. So any tip would be helpful