The value of name locator has probably changed to "file_1" now. Or else you can use id locator with this value and try once "inputFile".
WebElement fileInput = driver.findElement(By.name("file_1"));
fileInput.sendKeys("C:/path/to/file.jpg");
If this still does not work, then try this:
driver.findElement(By.id("inputFile")).click();
driver.switchTo()
.activeElement()
.sendKeys("C:/path/to/file.jpg");