Cyme Desk is based on Zoho Desk and unfortunately there is an incompatibility with Safari when creating the account.
This bug seems to be related to the way Zoho Desk handles cookies.
Despite numerous exchanges with their development teams, the problem still does not seem to be resolved.
It is therefore important to use another browser to create the account. For example, you can use Google Chrome.
We remind you that this is just for the creation of the account. Then you can use Safari.