Export to pdf doesn't work in reports

I modified an existing report, added new parameters, and new fields on displaying the results, but now the button Export to Pdf doesn't work. The file Print works. Here is the log file.



2018-03-12 13:03:06.144 ===== TRACE ===== DISCONNECTED USER 'admin'
2018-03-12 13:03:29.423 ***** ERROR ***** [V6.3.0] EXCEPTION *****
2018-03-12 13:03:29.428 ***** ERROR ***** [V6.3.0] on file 'C:\xampp\htdocs\projeqtor\external\html2pdf\_class\parsingHtml.class.php' at line (118)
2018-03-12 13:03:29.432 ***** ERROR ***** [V6.3.0] cause = ERROR n°4 : HTML code invalid, the tags are not closed in an orderly fashion.Status : Array
(
[0] => page
[1] => table
[2] => tr
[3] => tr
)
HTML : ...style="width:20%;">2</td><tr></table></page>...
2018-03-12 13:03:29.437 ***** ERROR ***** [V6.3.0] => #0 C:\xampp\htdocs\projeqtor\external\html2pdf\html2pdf.class.php (436) -> parse()
2018-03-12 13:03:29.441 ***** ERROR ***** [V6.3.0] => #1 C:\xampp\htdocs\projeqtor\view\print.php (239) -> writeHTML()
2018-03-12 13:03:29.445 ***** ERROR ***** [V6.3.0] => #2 C:\xampp\htdocs\projeqtor\view\print.php (183) -> finalizePrint()

I got that, but the problem is that with other reports it works, but with this one no. And I wanted to know if it had something to do with the fact that i changed some parameters and other things on this report