Two problems with the Veracrypt app

[AlexValue]

Hi!
Veracrypt is one of the most popular and reliable applications for local file encryption and data protection.
I encountered the following problems with Veracrypt on VanillaOS:

First problem:

1. I download the Veracrypt installation file from their official website
   https://www.veracrypt.fr/en/Downloads.html
   (I choose the Debian 12 GUI version)

2. I open the .deb file by double-clicking and run it in "Sideload".

3. After some waiting, I get a message that the installation was successful

4. Error: the application icon does not appear on the desktop.

With another application (lantern), which I also installed from a .deb file, there is no such problem.

Second problem

1. I run the veracrypt application by typing "veracrypt" in the terminal, the application starts correctly.

2. I select the option to mount an existing crypto container, select my crypto container file.

3. Enter the password for the crypto container

4. Error: at this step the application should usually ask for the administrator password (this happened on Fedora), but it returns one of the following errors:

4.1. If the crypto container is in my "downloads" folder

Access denied:
/media/veracrypt1

VeraCrypt::Directory::Create:29

4.2. If the crypto container is on an external drive

Access denied:
/media/MyUserName/ExternalDriveName/CryptoContainerName

VeraCrypt::File::Open:287

[AlexValue]

@kbdharun @GabsEdits
Hello!
Could you please tell me if there is a solution to this problem?

I managed to get around the first problem with the icon by opening the application from the terminal.
But I don't know what to do about the second problem.