this block has encountered an error and cannot be previewed only on medias blocks

guys. I just installed the last version of WordPress (5.7.2) on my computer by using Xampp.

All seem to go well except when I want to add a block related to media only.

Before this, I got some problems with the admin panel which was displayed as a white screen. I searched on youtube and found a solution by adding :

define('CONCATENATE_SCRIPTS', false);

under the comment :

/* That's all, stop editing! Happy publishing. */

Please can you help me??