The front-ends depend on libopenconnect5, which in turn depends on libtss2-mu0.
The latter one got replaced by libtss2-mu-4.0.1-0 during the last upgrade and therefore
breaks libopenconnect5's dependency:
libtss2-mu-4.0.1-0:
Replaces: libtss2-esys0 (<< 3.0.1-2), libtss2-mu0 (<< 4.0.1-4)
Breaks: libtss2-esys0 (<< 3.0.1-2), libtss2-mu0 (<< 4.0.1-4)
As a provisional solution one can replace the offending dependency of libopenconnect5
by the new libtss2-mu-4.0.1-0 dependency and rebuild the package. But this method
is not for the faint of heart.