Mistake # 2: "sub process / usr / bin / dpkg returned an error code (2)"
An easy way to fix:
1) Run Cydia
2) Find the tweak gzip and submenu click reinstall
3) Find tweak bzip2 and submenu click reinstall
4) Changes in Cydia go and click on Refresh
5) Wait for Cydia update.
If the first method does not help, then we do this:
1) Using the file manager (IFile or IFunbox) go to the file system:
2) Go to the directory / var / lib / dpkg /
3) This directory can see files: available, availble-old, status, status-old
4) Rename the "available" file in the "available-bak"
5) Rename the file "status" in the "status-bak"
6) Rename the file "available-bak" in the "available"
7) Rename the file "status-old" to the "status"
8) Run Cydia and wait, when fully loaded and try to adjust tweak.