Thank you. This Classname and Package name entries were the key for both working CMP and use of migxLoopCollection snippet. (Until now, after creating a simple table, I was using phpmyadmin for adding data and rowboat to display it lol) Now both works in my test environment (NGINX1.18.0, PHP7.4.33, ModX3.0.3 and migx 3.0.1-beta1 )
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Very nice tutorial @robcarey, thank you! 
Regarding âeasy package buildingâ, is there a similar easy way to make a package from the resources in a context, to be able to quickly make a âdummy contentâ package?
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Thanks @sebastian-marinescu ! I donât have an answer to this myself, but I would also love some insights into this. So far I am using variations of the workflow in my video for developing full complex systems for live sites in the safety of staging sites. Quite often there are resources I would love to also include in the package when I get to the point of âpushing it liveâ
If you find the answer to this elsewhere, please report back here!
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I didnât find the definitive answer yet, but the last years, Iâve been using Gitify to push resources and other things around environments. Itâs convenient, after you get used to resolving the ID-conflicts manually 
Also there is âteleportâ that does something similar, and I think the MODX-cloud is using it for pushing between environments.
When I find a nice answer on how to easily package dummy-content up, Iâll let you know 
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