Hi Justin Brodie
It might be from the CommunityCommon Module you can re import it from the Marketplace
if it is already imported choose Replace existing module
If this doesn't work so it might be a proxy issue to solve it
Open C:\Program Files\AdoptOpenJDK\jdk-11.0.3.7-hotspot\conf\net.properties and add
http.proxyHost=your.proxy.url
http.proxyPort=your.proxy.port
https.proxyHost=your.wproxy.url
https.proxyPort=your.proxy.port
Restart your computer.
Please recommend this as accepted answer if it solves you issue
Thanks