What did you do to cause this? I just made a fresh install...
What page were you on? login page (but it appears on other pages too.
What PHP and MariaDB versions do you run?
Describe the defect: Some text appears before and after each pages of the bugtracker :
Seems to be a glitch in the template. By the way, I'm using traq in english (default language, default installation) and the text is in french...
This sounds like an issue related to the server or plugin.
Did you install Traq locally on your computer?
If so, how did you setup Apache, PHP, etc. If not, who is your web host and is it a shared plan, VPS or something else?