Thousands of errors with Collapsing Categories

I generated a sitemap and it resulted in thousands of errors, all the same – looks php-based:

try { collapsItems['catTest'] = 'test'; } catch (err) { collapsItems = new Object(); }
collapsItems['collapsCat-223:3'] = '';
collapsItems['collapsCat-16822:3'] = '';
collapsItems['collapsCat-16948:3'] = '';
collapsItems['collapsCat-17816:3'] = '';
collapsItems['collapsCat-22479:3'] = '';
collapsItems['collapsCat-162:3'] = '';
collapsItems['collapsCat-520:3'] = '';
collapsItems['collapsCat-22729:3'] = '';
collapsItems['collapsCat-17324:3'] = '';
collapsItems['collapsCat-20890:3'] = '';
collapsItems['collapsCat-21222:3'] = '';
collapsItems['collapsCat-22625:3'] = '';
collapsItems['collapsCat-224:3'] = '<li class=\'collapsing categories item\'><a  href=\'https://www.mysite.com/blog/mag/sport/football/\' title=\"football, sports\">football sport</a>         </li> <!-- ending subcategory --><li class=\'collapsing categories item\'><a  href=\'https://www.mysite.com/blog/mag/sport/hockey/\' title=\"hockey, sports\">hockey sport</a>         </li> <!-- ending subcategory --><li class=\'collapsing categories item\'><a  href=\'https://www.mysite.com/blog/mag/sport/basketball/\' title=\"basketball, sports\">basketball sport</a>         </li> <!-- ending subcategory -->