Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /homepages/44/d90524206/htdocs/cover_generator/cover_generator.php:167
Stack trace:
#0 /homepages/44/d90524206/htdocs/cover_generator/cover_generator.php(213): remove_temp_files()
#1 {main}
thrown in /homepages/44/d90524206/htdocs/cover_generator/cover_generator.php on line 167