Is this file generated by topodroid?
I mean: you never edit it in cSurvey?
As I can see the problem in the xml: at row 1248 a 'space' is missing between "xx0" and "scale":
<item type="point" name="label" cave="P_CASCADEI" branch="1" text="muschi pe travertin" bind="xx0"scale="0" orientation="0.00" options="" >
You can fix manually adding the missing space.
If the file was made by Topodroid I suggest to update (manually) to the new Topodroid version 6 that use a different logic in cSurvey export and, I guess, solve this problem.
As far as I knows Topodroid v5 is not more updated.