However lines for other libraries don't say anything about "Qt_5.7" version.
This is of no consequence as everything depends on QtCore anyway.
And @hskoglund was telling about Qt 5.6.
Because you'd have the same problem if the application was built against Qt 5.6.
You either need to upgrade your Qt to version 5.7 or your colleague has to build and link the application against Qt 5.5.