I have noticed that when the latest-master release files on github have been updated (I think Travis script handles this?) the link to core looks similar to this:
https://github.com/WagicProject/wagic/releases/download/untagged-4d18d2f30312a41b2e82/Wagic-core.zip
For new installs of WTH, the core file is attempting to download from this link:
https://github.com/WagicProject/wagic/releases/download/latest-master/Wagic-core.zip
At first I thought that the bug may just be a co-incidence of somone manually updating the release and it would not occur often. But when I see that Travis will be updating on every master commit/merge, this seems to be a re-occuring problem.
While it may only happen when first installing (so, low chance of happening), it may be investigated as a network or storage bug mistakenly.