Render error on dataprovider sort disabled

[neoacevedo]

Prerequisites

• [x] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [x] The issue still exists against the latest master branch of yii2-mpdf.
• [x] This is not an usage question. I confirm having gone through and read the documentation.
• [x] This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• [x] I have attempted to find the simplest possible steps to reproduce the issue.
• [x] I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

1. Set sort to false on data provider: $dataProvider->setSort(false);
2. Get HTML raw content on variable to use with PDF
3. Configure new Pdf object $pdf = new Pdf([...]); and return PDF output

Expected behavior and actual behavior

When I follow those steps, I see... A bad render:

%PDF-1.4 %���� 3 0 obj <> (...)

It is presents only with AdminLTE and in only one view. With default theme (Yii2 predefined view), all views are rendered normally.

I was expecting... Render of view just like HTML with disabled table header sort.

Environment

PHP 7.1.12

Browsers

• [x] Google Chrome
• [x] Mozilla Firefox
• [ ] Internet Explorer
• [ ] Safari

Operating System

• [ ] Windows
• [ ] Mac OS X
• [x] Linux
• [ ] Mobile

Libraries

• jQuery version: 3.2.1
• yii2-mpdf version: dev-master 67980ab

Isolating the problem

• [ ] This bug happens on the demos page
• [x] The bug happens consistently across all tested browsers
• [ ] This bug happens when using yii2-mpdf without other plugins.

[diego-betto]

try setting 'mode' => Pdf::MODE_BLANK

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.