A bug in the game prevents me from continuing the procedure of replacing a Realm with a World that I have created.

A few days ago I started a free trial to test the realms for a month and I have been working separately in a downloaded world for a few months. However, when I wanted to turn the world into a Realm a separate Realm was created with a new seed and the option to "Replace Realm with another World" fails. When I press the button it starts the exploration and when it starts the loading procedure that is when the line does not advance and marks an error