cop failing to start - client.db is not a function

[stevewillson]

I'm attempting to use cop on Ubuntu 18.04 and when I attempt to start cop after installing it I get the following error:

Below is text copied from journalctl -f -u cop

mongod is 'active'

Any advice is appreciated.

Dec 08 20:36:35 ubuntu systemd[1]: cop.service: Scheduled restart job, restart counter is at 4. Dec 08 20:36:35 ubuntu systemd[1]: Stopped COP. Dec 08 20:36:35 ubuntu systemd[1]: Started COP. Dec 08 20:36:35 ubuntu node[2431]: {"level":30,"time":1575866195675,"pid":2431,"hostname":"ubuntu","msg":"Server listening on port 3000!","v":1} Dec 08 20:36:35 ubuntu node[2431]: /opt/cop/node_modules/sharedb-mongo/index.js:178 Dec 08 20:36:35 ubuntu node[2431]: self.mongo = client.db(); Dec 08 20:36:35 ubuntu node[2431]: ^ Dec 08 20:36:35 ubuntu node[2431]: TypeError: client.db is not a function Dec 08 20:36:35 ubuntu node[2431]: at finish (/opt/cop/node_modules/sharedb-mongo/index.js:178:27) Dec 08 20:36:35 ubuntu node[2431]: at mongo (/opt/cop/app.js:120:26) Dec 08 20:36:35 ubuntu node[2431]: at ShareDbMongo._connect (/opt/cop/node_modules/sharedb-mongo/index.js:184:5) Dec 08 20:36:35 ubuntu node[2431]: at new ShareDbMongo (/opt/cop/node_modules/sharedb-mongo/index.js:65:10) Dec 08 20:36:35 ubuntu node[2431]: at mongodb.connect (/opt/cop/app.js:119:17) Dec 08 20:36:35 ubuntu node[2431]: at result (/opt/cop/node_modules/mongodb/lib/operations/execute_operation.js:75:17) Dec 08 20:36:35 ubuntu node[2431]: at executeCallback (/opt/cop/node_modules/mongodb/lib/operations/execute_operation.js:68:9) Dec 08 20:36:35 ubuntu node[2431]: at err (/opt/cop/node_modules/mongodb/lib/operations/connect.js:193:7) Dec 08 20:36:35 ubuntu node[2431]: at connectCallback (/opt/cop/node_modules/mongodb/lib/operations/connect.js:343:5) Dec 08 20:36:35 ubuntu node[2431]: at topology.connect.err (/opt/cop/node_modules/mongodb/lib/operations/connect.js:475:7) Dec 08 20:36:35 ubuntu systemd[1]: cop.service: Main process exited, code=exited, status=1/FAILURE Dec 08 20:36:35 ubuntu systemd[1]: cop.service: Failed with result 'exit-code'. Dec 08 20:36:35 ubuntu systemd[1]: cop.service: Service hold-off time over, scheduling restart. Dec 08 20:36:35 ubuntu systemd[1]: cop.service: Scheduled restart job, restart counter is at 5. Dec 08 20:36:35 ubuntu systemd[1]: Stopped COP. Dec 08 20:36:35 ubuntu systemd[1]: cop.service: Start request repeated too quickly. Dec 08 20:36:35 ubuntu systemd[1]: cop.service: Failed with result 'exit-code'. Dec 08 20:36:35 ubuntu systemd[1]: Failed to start COP.