Can u find the search icon on ejs?
I look at the error codes generated from the console.
Use the search to identify the location of the search
For example "posvol"
It will show all instants where the "posvol" occur
Remove them or fix them.

It is ok not to have satellite 4xx.XML
Just start to save different versions now so if things screw up so badly, can always abandon the file n revert to older files.

Look at the new source codes for the details