Strange "Error: TracyLogsPanel" in one project

[Stefanowitsch]

I keep getting this error message on all backend and frontend pages in one of my projects:

ErrorException: Undefined array key 1 in /var/www/html/site/assets/cache/FileCompiler/site/modules/TracyDebugger/panels/TracyLogsPanel.php:71
Stack trace:
#0 /var/www/html/site/assets/cache/FileCompiler/site/modules/TracyDebugger/panels/TracyLogsPanel.php(71): Tracy\Bar->Tracy\{closure}(2, '...', '...', 71)
#1 /var/www/html/site/assets/cache/FileCompiler/site/modules/TracyDebugger/tracy-2.10.x/src/Tracy/Bar/Bar.php(142): TracyLogsPanel->getTab()
#2 /var/www/html/site/assets/cache/FileCompiler/site/modules/TracyDebugger/tracy-2.10.x/src/Tracy/Bar/Bar.php(115): Tracy\Bar->renderPanels('')
#3 /var/www/html/site/assets/cache/FileCompiler/site/modules/TracyDebugger/tracy-2.10.x/src/Tracy/Bar/Bar.php(89): Tracy\Bar->renderPartial('...')
#4 /var/www/html/site/modules/TracyDebugger/tracy-2.10.x/src/Tracy/Debugger/DevelopmentStrategy.php(123): Tracy\Bar->render(Object(Tracy\DeferredContent))
#5 /var/www/html/site/assets/cache/FileCompiler/site/modules/TracyDebugger/tracy-2.10.x/src/Tracy/Debugger/Debugger.php(314): Tracy\DevelopmentStrategy->renderBar()
#6 [internal function]: Tracy\Debugger::shutdownHandler()
#7 {main}

I am using the newest PW Version and the newest Tracy Debugger Version, can anybody give me a hint what is happening here?