I receive the following error message:

Failed loading XML... Opening and ending tag mismatch: meta line 1 and head Opening and ending tag mismatch: li line 1 and ul Opening and ending tag mismatch: li line 1 and div Opening and ending tag mismatch: li line 1 and div Opening and ending tag mismatch: li line 1 and div Opening and ending tag mismatch: li line 1 and div Opening and ending tag mismatch: li line 1 and div xmlParseEntityRef: no name xmlParseEntityRef: no name xmlParseEntityRef: no name xmlParseEntityRef: no name Opening and ending tag mismatch: li line 1 and div Opening and ending tag mismatch: li line 1 and div Opening and ending tag mismatch: ul line 1 and div EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' EntityRef: expecting ';' Opening and ending tag mismatch: div line 1 and section Opening and ending tag mismatch: div line 1 and body Opening and ending tag mismatch: div line 1 and html Premature end of data in tag div line 1 Premature end of data in tag div line 1 Premature end of data in tag div line 1 Premature end of data in tag div line 1 Premature end of data in tag div line 1 Premature end of data in tag section line 1 Premature end of data in tag body line 1 Premature end of data in tag head line 1 Premature end of data in tag html line 1

What is this and how to fix it?
It is installed on a Joomla 3.3.3 and the module is fetching this url (module obvious to superusers only for now).