You’ve actually got two separate problems mixed together in that paste:
1) plugins.slots.memory: plugin not found: memory-core
memory-core is supposed to be a bundled plugin (it lives in OpenClaw’s extensions/ folder). That error usually means your gateway install can’t see the bundled extensions/ directory, so it never “discovers” memory-core, and config validation hard-fails.
Please paste the output of these (redact nothing except secrets if any show up):
openclaw --version
which openclaw
echo "$OPENCLAW_BUNDLED_PLUGINS_DIR"
openclaw plugins list
openclaw plugins doctor
Quick workaround if you just want the gateway to start without memory for now: