Searching the top frame from my exceptions stack brings up other openhab 3 related topics:
[neeo] Can Not Add Brain - OH3 · Issue #8984 · openhab/openhab-addons · GitHub
[tesla] Failed to find JAX-RS Client · Issue #7775 · openhab/openhab-addons · GitHub
Perhaps this is helpful for someone with a little more insight into openhab mechanics…