MIGX Columns and Template Variables

Hi

I'm using MODX Revolution version 2.4.2 and MIGX version 2.9.6-pl hosted on MODX Cloud.

I've followed the tutorial about creating an events manager found on the MIGX tutorial. Initially I encountered an issue related to the getTVcombo.php file but managed to overcome this via the following post on the forum.

https://rtfm.modx.com/extras/revo/migxdb/migxdb.tutorials/migxdb.manage-events-resources-in-a-cmp-with-help-of-migxdb

I've now completed the tutorial and all is working, except for the values within the tv. I've created all 3 template variables using the same names as used in the tutorial. The template variables show when creating an event, but the values entered into the template variables are not saved. Could someone please provide some assistance or advice as to why this may be the case? If I edit the values within the template variable on the actual resource, these are saved, but aren't the displayed when editing in the CMP or within the grid view.

I've attached a copy of the configuration. I'm also receiving an error related to an inability to load the package metadata, although I get this for numerous other packages so I'm not too worried about that error.