Hello to you team,
First of all I apologize for my English, I am a Frenchman.
The synchronization of the Davx5 application with OpenTask is not done correctly, davx5 manages to synchronize the Nextcloud agenda (I see the calendars created) but does not synchronize the tasks from the phone to the computer and vice versa.
I use a Xiaomi RedMi Note 7 phone, I searched the internet and they say to allow all permissions from both applications and remove the battery optimization, which I did.
I also tried to install the OpenTask application before Davx but still no synchronization of my tasks.
The application I use davx is the paid version available on playstore because I have already tested with the other available on f-droid without real functioning.
Thank you in advance for your help, and I wish you a good day.