The log shows you have a single tuner for satellite or one DVB-S tuner, correct?
There are some time-shift remarks which may explain the tuner busy message.
It is great that you have an older OpenVix image that works, but it will not help us much. The blindscan plugin has been upgraded and altered since that old VIX image was released, so we will have to work with something new to fix it.
SatDreamGr is similar to PLI, and I am more used to working with it. That is the image we need to try and get working. Please reload it and check the following.
(1) Repeat the same test to make a debug log.
(2) Change the lnb to Universal, Then blindscan and report what that produces.
(3) Try a C band blindscan and report what it produces.
Maybe doing the above 3 things will get us somewhere or tell us something.