I created a temporary workaround for this by extracting, and compressing the add-on's into WINRAR files themselves, since the mod creator won't do anything to fix this issue, i went ahead and fixed it for everyone, mod belongs to original creator of course.

https:// www.mediafire. com /folder/ vqwdqb5uqt4e9/ Extracted_Gmod_Add-on's

Just put this in your URL without the spacing! ALL the add-on's for Hbombs are in RAR format, just extract them to your add-on's and it should make them appear again, the error's that were appearing BEFORE this add-on stopped working in-game are still present, but it should still work nonetheless!

For some reason the link before broke, and showed a white screen, it should work now! Enjoy!