I created a new IntelliJ project by importing source from a cloned GIT repository. I then configured the Illuminated Cloud module within the project structure, successfully setting up a new connection and generating an offline symbol table. I think navigated to the src folder and picked the Retrieve Metadata option from the Illuminated Cloud menu. After selecting the package, a progress bar initially appears (see attachment) and then after a pause of about 1 minute, and error popup appears (see attachment). Error code 819125902-101858 (-652670408).
Issue #192 resolved