Why can I mount, but I cannot access to files in VeraCrypt container?

I can mount, but I cannot access to files in VeraCrypt container. There is error when opening partition:

“no access, reached the end of the file.”

But When I have changed the letter for mounting, Veracrypt mounted container and there was message about file system errors after incorrect dismount. I could copy files.

The matter is. One time I mounted VeraCrypt container as usual drive in Windows 10. There are No hidden system in mounted file. I was scanning paper photos with VueScan software, which saved the images to the container automatically.

At the same time I used VirtualBox virtual machine and other scanner to scan films. I scanned and make autosaves to the same container.This was made with VueScan also. I have installed this software both on virtual and real system. The virtual operating system is Windows XP. The computer hanged and I had to restart. The problem appeared after it. Before this I scanned so for years.