Need help with server error coming up

Here is a link to my first post in General Support v1.5x:
viewtopic.php?f=20&t=202148
Here is the Error coming up:
Warning: DOMDocument::loadXML() [domdocument.loadxml]: Opening and ending tag mismatch: P line 6 and BODY in Entity, line: 8 in /home/uniforma/public_html/store/catalog/model/shipping/ups.php on line 236
Warning: DOMDocument::loadXML() [domdocument.loadxml]: Opening and ending tag mismatch: BODY line 3 and HTML in Entity, line: 9 in /home/uniforma/public_html/store/catalog/model/shipping/ups.php on line 236
Warning: DOMDocument::loadXML() [domdocument.loadxml]: Premature end of data in tag HTML line 1 in Entity, line: 10 in /home/uniforma/public_html/store/catalog/model/shipping/ups.php on line 236
Fatal error: Call to a member function getElementsByTagName() on a non-object in /home/uniforma/public_html/store/catalog/model/shipping/ups.php on line 240
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Please reply for more info, Thank you. Gary

This is simple: some XML file has wrong format and thus can not be parsed.

Hi Gary,
Greetings for the day !!

Sent you a PM. Kindly check it.
Waiting for your quick reply.

Regards
Gabriel Albert