3 versions of openlinkhub are installable from the AUR (Arch User Repository):
A pre-compiled version (v 0.7.2-1):
The latest official release (v 0.7.2-1)
The most recent Git version (v 0.7.2.r22.gce40695-1)
So, I would recommend that you uninstall the manually installed version (instructions are here), and see if installing one of the above versions, which are specifically packaged for Arch Linux (and thus Arch-based distros such as Manjaro), works better on your system.
As all 3 AUR versions are packaged by the same person, I would recommend that you try the openlinkhub-bin package first, as it is a precompiled version and should take a lot less time to build on your system:
pamac build openlinkhub-bin
Each of the above links also contains comments by users - none of them seem to have had any issues recently.