We had a number of reports of LimeSDR Mini boards intermittently failing loopback tests that are run by the LimeQuickTest utility. Upon investigation, it turned out that the VCO bias current for LimeSDR Mini was being set lower than it was for other boards, which was resulting in this error and possibly other issues. This has now been fixed in Lime Suite and for the time being it is recommended to build from source using the master branch. A new release is planned for the end of July and at this point updated packages will also be available.