Hello Kubi q,
1.Sorry, I didn’t give much information since I am a Spanish speaker.
2.To expand the functionalities of the 2024 WordPress theme, they also recommend installing the Gutenberg plugin and this apparently enables the template editor when you go to the template section and enter, for example, pages or patterns in the header or footer after Making some movements with the building blocks such as Row or columns will generate a loop that seems related to React, for this I initially deactivated all my plugins and additionally activated them one by one to understand which one generated the issue and the combination of these two was the solution. that caused the problem