The conversation with "su" has failed

[Snowhog]

So nothing; files (hidden or not) and directories; in the lop level of your user home directory are owned by root (a good thing), but somewhere within one of the directories is chrome-sandbox which is, so let's find it.

In a konsole type: find . chrome-sandbox -type f and press Enter. Assuming it's found, copy and paste the result here in your reply.

[Supersayano]

The console output to that command is so long that it doesn't show it all. Although I go up to the top, the beginning does not appear. If you tell me how to make the console show all the output of the command, I can paste it all. For now I'm putting a screenshot of the final part, where, as you can see, the last line says:

"find: ‘chrome-sandbox’: The file or directory does not exist

Greetings...

[Snowhog]

Something isn't right. IF you typed my command exactly, and the file truly doesn't exist, then just the prompt should have returned. Please try again, but copy then paste the command I provided.

[Supersayano]

I better make a screenshot in .gif so you can see that I do exactly what you ask me to do.
Thank you...

[Snowhog]

Not helpful; scrolls way to fast. Not a problem. Redo the command, but we'll have it pause so you can copy the first screen full.

Copy then paste the folloing command in Konsole: find . chrome-sandbox -type f | more

[Supersayano]

julio-cesar@mi-equipo:~$ find . chrome-sandbox -type f​ | more
find: Must separate multiple arguments to -type using: ','
julio-cesar@mi-equipo:~$

Greetings...

[Snowhog]

That’s a pipe symbol between f and more; it isn’t a lowercase L

[Supersayano]

Sorry, I don't know what you mean, I just copied and pasted your command. Please tell me what exactly I should do.
Greetings...

[Snowhog]

Okay. Sorry. Communications by text isn't the best, and it's slow. I appreciate your patience.

So let's try this. Type: sudo find / -name chrome-sandbox -type f

[Snowhog]

I'm stepping out for an errand, so I won't be answering for about an hour, give or take.

[Supersayano]

This is the console output:

julio-cesar@mi-equipo:~$ sudo find / -name chrome-sandbox -type f
[sudo] contraseña para julio-cesar:
find: ‘/run/user/1000/doc’: Permiso denegado
/home/julio-cesar/Deemix/chrome-sandbox
/home/julio-cesar/balenaEtcher/chrome-sandbox
find: ‘/proc/30698’: No existe el archivo o el directorio
/opt/google/chrome/chrome-sandbox
julio-cesar@mi-equipo:~$

I am attaching some screenshots of the properties of the files called "chrome-sandbox" which, according to the console output, are in my user's folder, that is, "/home/julio-cesar/Deemix/chrome-sandbox" and "/home/julio-cesar/balenaEtcher/chrome-sandbox".
Greetings...

[Snowhog]

So the two instances of chrome-sandbox both have Ownership (User / Group) of you (julio-cesar). Nothing wrong there, so nothing needs doing here.

As this thread is getting long, let me just ask, because I "think" I saw you mention, but... This issue; does it occur only with some applications? Is that correct? Do you know?

[Supersayano]

Indeed, for now the problem only affects Grub Customizer and the driver manager opened from the system preferences. But my fear is that this will spread and there will come a time when it will prevent me from opening normally or at all any application that requires the password.
Greetings...

[Snowhog]

Create a new user and make it an Account type: Administrator. System Settings > Users > + Add New User

Logout of your current session and login with the new user and launch Driver Manager. Does the new user also experience this issue, or is the password accepted as expected?

[Supersayano]

Indeed, in the new user created, the same error occurs when opening the driver manager from the system tools. What does that mean?.
Greetings...