0x800B0100 and 0x800B0109: update signature and certificate failures
0x800B0100 and 0x800B0109 mean Windows cannot validate the update signature. Refresh the trusted root certificates and SHA-2 support, then retry the install.
0x800B0100: MSIX Package Is Unsigned or Its Certificate Is Not Trusted
0x800B0100 and 0x800B0109 block MSIX installs when the signing chain is absent or untrusted. Import the signing certificate correctly, or re-sign the package.