know that we have pacman 4 in core, I noticed that some users cannot
install packages maintained by some packagers that didn't acquire at
least 3 master signatures.
Also you won't be able to push any new packages into repos because the
key is untrusted so is in your best interest to became trusted.
Please check your number and reply to all master emails as instructed
ASAP. Your key needs to be signed by all 5 master keys.