Attempting to build my mod with the latest version hits me with "Could not GET 'https://jitpack.io/com/github/CrimsonDawn45/Fabric-Shield-Lib/1.4.5+1.17/Fabric-Shield-Lib-1.4.5+1.17.pom'. Received status code 400 from server: Bad Request
Disable Gradle 'offline mode' and sync project"

Gradle is not in offline mode, and it was working fine with version 1.4.3.

attached is my build.gradle and gradle.properties:
build.zip

Sorry about that, I'm having some issues with jitpack not recognizing 1.4.5 as a release for some reason

In order for jitpack to recognize the release, I had to change the + sign back to a -. So you'll have to edit your Gradle settings and make sure the tag you're trying to get with jitpack is "1.4.5-1.17". it should work now.