To connect a Zempler account to Coconut requires an access code from the Zempler app. You can get the code by clicking the box with the 3 dots in the Zempler app. Enter this code and the link should be validated The sequence should be as below
1) click allow to start the connection between coconut and Zempler
2) enter your Zempler user name
3) enter your Zempler password
4) get the code from the Zempler app
switch to Zempler app to get the code
click the 3 dots in the box to get the code
5) copy the code
switch back to coconut and paste
then click login in
6) tick the account to connect
7) connect confirmation switches back to coconut