Mqqt error - cannot accept children tags

Hi all

Bit of a noob here. Had everything up and running some months ago and just booted it all up again only to get this error from Mqtt Engine. Everything is running and connected however am not receiving any tags within Ignition like I was before. Logs show following errors which is a bit over my head

Any advice?


Further Debug added

OK so after 2 hours of messing around I decided to remove the folder ‘home’ under the folder ‘PUMP’ of the Mqtt Engine tag group. Instantly things fixed themselves. Unsure what happened here, but am going to try reproduce the issue.