Single product display Error

[dhananja6557]

Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1 in C:\xampp\htdocs\ecom\admin\class\adminback.php:364 Stack trace: #0 C:\xampp\htdocs\ecom\admin\class\adminback.php(364): mysqli_query(Object(mysqli), 'SELECT * FROM `...') #1 C:\xampp\htdocs\ecom\single_product.php(15): adminback->display_product_byId('') #2 {main} thrown in C:\xampp\htdocs\ecom\admin\class\adminback.php on line 364

[Engbilal]

Single product display Error it just shows the progress bar only.

[maxsharmaz]

Single product display Error it just shows the progress bar only.

how to fix this. I also got same error