Very outdated package, especially in Manjaro Stable
The spectre-meltdown-checker package version here is 0.40, but it is 0.37 in Manjaro Stable. The latest official and AUR version is 0.42.
The issue has been reported on the forum months ago.
If you don't want to spend time on keeping the package up-to-date, please consider removing it from Community and letting the users install and upgrade it from AUR. This should not be a problem because the installation is fast (a single file is copied).