There seems to be a checksum error. The webpage says the package should be 102.9MB, and when i download it comes out to the size of the 00.07.04.03 package, 98.1 MB.
I would recommend re-downloading the archive. I was able to open it without issues, thus your download may simply have gotten corrupted.
Additionally, you seem to be using an older version of the SDK download page, please use this one: Software Development Kit - Teltonika Networks Wiki