Invalid tag name tagname in container containername.
The tag tagname is not recognised as a valid tag for this container.
It may have been valid for a previous build number but has since been removed, or it may be misspelled. If the file is corrupted (for instance, if double quotes are missing or duplicated) then it is possible that a part of a description has been read as a tag.
Remove the tag if it is not required, or correct the spelling if it has been misspelled. If the file is corrupted then the file needs to be repaired, possibly by adding or removing double quotes to ensure that tag values are not read as tags.