The issue with the scenes is detailed in the first post, primarily because I can't access customizations I can't set up scenes as I want to use them. Although some of the scenes using previous customisations do work (so some of them must be on the sever somewhere)
Additionally Tasker can't access any of the customized scenes because when choosing "Scene" and then "Select Customized Scene" the Yeelight app crashes.
I posted a detailed issue about Alexa Routines several weeks ago in another thread and have had no response.
The issue is this, because things like Alexa Routines and Tasker aren't working like they should the only work around was to use customised scenes, because I now can't set-up customised scenes I can't use any of these things in a useful way.
With my limited technical knowledge can I suggest that maybe something went wrong with the migration of my data to the new server, and that maybe you need to either repeat this migration, or as a last resort clear my customisations from the server. I notice if I change servers, although none of my devices etc are there it will allow me to open customisations without the app crashing.