(Drupal newb - please go easy and give references that help me learn how to debug stuff in Drupal myself, thank you!)
I've taken over a Drupal site with 7.80.
There's a type called Event which has a bunch of fields including an Image. There are many existing Events where Image upload presumably worked fine in the past. The images are visible when editing those Events.
Problem: The form for adding a new Event renders the Image control as a text box (i.e.
input type='text' with an attach button instead of a file control (i.e.
Also notable that if I use e.g. chrome inspector to change the type of the input to file and then try to upload a file it fails with:
"The file in the Image field was unable to be uploaded."
How can I start to debug this? Google didn't turn up any obvious hits that I could find so pointers on how to start debugging much appreciated!