The problem is a typo. We got by for years without having kernel verification for the feeds. Never had a minute's trouble with kernel changes and feeds, even when Edision was changing kernel versions regularly. Shown below is the error. Build the image from sources and use custom feeds does not give any problems. It will be easily fixed...
< 173.383616> 06:40:31.1946 [StackTrace] ========== Stacktrace of active Python threads ===========
< 173.383721> 06:40:31.1946 [StackTrace] ========== Thread ID 0xafc04380 =========================
< 173.383762> 06:40:31.1947 [StackTrace] File: "/usr/lib/python3.12/threading.py", line 1032, in _bootstrap
< 173.383801> 06:40:31.1947 [StackTrace] File: "/usr/lib/python3.12/threading.py", line 1075, in _bootstrap_inner
< 173.383836> 06:40:31.1948 [StackTrace] File: "/usr/lib/python3.12/threading.py", line 1012, in run
< 173.383899> 06:40:31.1948 [StackTrace] File: "/usr/lib/python3.12/site-packages/twisted/_threads/_threadworker.py", line 48, in work
< 173.383936> 06:40:31.1949 [StackTrace] File: "/usr/lib/python3.12/queue.py", line 171, in get
< 173.383973> 06:40:31.1949 [StackTrace] File: "/usr/lib/python3.12/threading.py", line 355, in wait
< 173.384020> 06:40:31.1949 [StackTrace] ========== MainThread 0xb5810b40 =========================
< 173.384057> 06:40:31.1950 [StackTrace] File: "/usr/lib/enigma2/python/StartEnigma.py", line 784, in <module>
< 173.384093> 06:40:31.1950 [StackTrace] runScreenTest()
< 173.384128> 06:40:31.1951 [StackTrace] File: "/usr/lib/enigma2/python/StartEnigma.py", line 398, in runScreenTest
< 173.384240> 06:40:31.1952 [StackTrace] runReactor()
< 173.384277> 06:40:31.1952 [StackTrace] File: "/usr/lib/enigma2/python/StartEnigma.py", line 564, in runReactor
< 173.384313> 06:40:31.1952 [StackTrace] reactor.run(installSignalHandlers=False)
< 173.384350> 06:40:31.1953 [StackTrace] File: "/usr/lib/python3.12/site-packages/twisted/internet/base.py", line 701, in run
< 173.384782> 06:40:31.1957 [StackTrace] File: "/usr/lib/python3.12/site-packages/twisted/internet/base.py", line 712, in mainLoop
< 173.384827> 06:40:31.1957 [StackTrace] File: "/usr/lib/enigma2/python/e2reactor.py", line 148, in doPoll
< 173.384864> 06:40:31.1958 [StackTrace] File: "/usr/lib/enigma2/python/e2reactor.py", line 44, in poll
< 173.384900> 06:40:31.1958 [StackTrace] File: "/usr/lib/enigma2/python/Components/ActionMap.py", line 58, in action
< 173.384971> 06:40:31.1959 [StackTrace] File: "/usr/lib/enigma2/python/Screens/PluginBrowser.py", line 237, in download
< 173.385035> 06:40:31.1960 [StackTrace] File: "/usr/lib/enigma2/python/Components/OnlineUpdateCheck.py", line 303, in kernelMismatch
< 173.385105> 06:40:31.1960 [StackTrace] File: "/usr/lib/python3.12/urllib/request.py", line 215, in urlopen
< 173.385142> 06:40:31.1961 [StackTrace] File: "/usr/lib/python3.12/urllib/request.py", line 515, in open
< 173.385206> 06:40:31.1961 [StackTrace] File: "/usr/lib/python3.12/urllib/request.py", line 532, in _open
< 173.385244> 06:40:31.1962 [StackTrace] File: "/usr/lib/python3.12/urllib/request.py", line 492, in _call_chain
< 173.385281> 06:40:31.1962 [StackTrace] File: "/usr/lib/python3.12/urllib/request.py", line 1373, in http_open
< 173.385346> 06:40:31.1963 [StackTrace] File: "/usr/lib/python3.12/urllib/request.py", line 1344, in do_open
< 173.385384> 06:40:31.1963 [StackTrace] File: "/usr/lib/python3.12/http/client.py", line 1336, in request
< 173.385420> 06:40:31.1963 [StackTrace] File: "/usr/lib/python3.12/http/client.py", line 1382, in _send_request
< 173.385486> 06:40:31.1964 [StackTrace] File: "/usr/lib/python3.12/http/client.py", line 1331, in endheaders
< 173.385524> 06:40:31.1964 [StackTrace] File: "/usr/lib/python3.12/http/client.py", line 1091, in _send_output
< 173.385560> 06:40:31.1965 [StackTrace] File: "/usr/lib/python3.12/http/client.py", line 1035, in send
< 173.385630> 06:40:31.1966 [StackTrace] File: "/usr/lib/python3.12/http/client.py", line 1001, in connect
< 173.385667> 06:40:31.1966 [StackTrace] File: "/usr/lib/python3.12/socket.py", line 841, in create_connection
< 173.385732> 06:40:31.1967 [StackTrace] File: "/usr/lib/python3.12/socket.py", line 976, in getaddrinfo
< 173.385770> 06:40:31.1967 [StackTrace] ========== Stacktrace end ================================
< 179.052183> 06:40:36.8631 [OnlineUpdateCheck][kernelMismatch] kernel mismatch found. STB kernel=5.15, feeds kernel=5.15.0
< 179.055017> 06:40:36.8660 [Skin] Processing screen 'MessageBox', position=(397, 535), size=(1125 x 10) for module 'MessageBox'.
< 179.062737> 06:40:36.8737 [Screen] Warning: Skin is missing element 'WarningPixmap' in <class 'Screens.MessageBox.MessageBox'>(The Linux kernel has changed, plugins are not compatible.
Install latest image using USB stick or Image Manager.).< 179.063022> 06:40:36.8739