Hello,
I just have this error with an 10.0.8 Drupal and with a 9.5.9 Drupal
My server have this configuration : Apache/2.4.54 (Unix) OpenSSL/1.1.1k PHP/8.1.6
My views are basic, I left the default configuration, my path is in the form /convention-impression.
The first time I generate the PDF view it works, but not after that.
What do others want as pieces of information ?
I get the same error (recorded in the logs) when I select my file which loads then I click on "submit" then, it displays this message:
" File upload in progress. Uploaded file may be lost.Do you want to continue?"
If I click "Continue", then my form is "reset" I can't load a file
On the other hand, when I use the TEST option of the form, I no longer have an error displayed and the test file is load.