Warning: Illegal string offset 'prev' in D:\www\maaskanttuinacces.nl\php\page_content.php on line 25

Fatal error: Uncaught Error: Cannot use string offset as an array in D:\www\maaskanttuinacces.nl\php\page_content.php:25
Stack trace:
#0 D:\www\maaskanttuinacces.nl\php\page_content.php(124): product_prev_next(Array, 4, 0)
#1 D:\www\maaskanttuinacces.nl\php\page.php(35): get_page_content(Array)
#2 D:\www\maaskanttuinacces.nl\www\default.php(14): include('D:\\www\\maaskant...')
#3 {main}
  thrown in D:\www\maaskanttuinacces.nl\php\page_content.php on line 25