Created attachment 614028 [details] requested information Reason: directory /usr/lib/libffi-3.3_rc0/include/ doesn't exist, but directory /usr/lib/libffi/include/ exists. I've solved the problem by downgrading to libffi-3.3_rc0 - after that the upgrade to plasma-5.17.5 succeeded. The requested information file can be found inside the attached tar file. CU Tom
*** This bug has been marked as a duplicate of bug 695788 ***