Backoffice styles broken

[gorf]

Hi all!

I have a problem with the styles and it is the following: I was adding the free "select2" to the custom theme configuration yaml, however to my surprises when accessing the backoffice I find this.

I have not touched any related files. Can you tell me why this is happening? However, if I access to some specific section the "marketing" section can be seen correctly with its icon, but only in certain cases. Even the icons of the rest of the menu are displayed correctly, but there is an overflow in the menu and the text is not readable



It's very strange, if you could help me I would appreciate it! There are no css download errors or console errors, everything loads correctly except for one image:

I'm using git, and also checked the last modified files on the server and it doesn't make sense to me this behavior.

Thank you so much!