Thank you in advance to everybody who would find a second to look into my problem.
Prehistory: my laptop doesn't have a battery, just working with the charger. The charger came out, so it turned off. After that the requested file failed to open. The file contains lots of text and images.
I tried to rename it, or open it with inkscape rather than to open the file from the opened program or recently opened files. None of this works. I do not have too much knowledge of computers and it's a couple of days work...

I uploaded the file here https://www.mediafire.com/view/3052rjvz ... 1.svg/file.
Again, thank you so-so much!!