Error while creating Simple Certificate activity in moodle 3.5.1

[sudhanshu0044]

While creating activity using "Simple Certificate" in moodle 3.5.1 I am facing issue in it.
Error code I am receiving is

"Exception - Argument 1 passed to file_get_all_files_in_draftarea() must be of the type integer, null given, called in [dirroot]/lib/form/filemanager.php on line 336"

I have attached error screen below.

Steps to reproduce the behavior:

1. Install Simple Certificate plugin in moodle 3.5.1.
2. Create an activity using simple certificate.
3. After filling the user fields & finally click on Saving & changes
4. See error

Here we expect that activity will successfully created.

[bozoh]

i can't reproduce this, have created many certificates with images, without images and works as expected, and this error messages isn't in the plugins files so it's very difficult to find where the error is without more info.

1. Which plugin version ?
2. Which php version?
3. can you turn on moodle's debug mode, and post the full error log ?

[sudhanshu0044]

1. I am using "Simple Certificate 2.2.8 (2018080400) - on Moodle 3.5"
2. Using php 7.1 version
3. Turning on the debug mode I am receiving error
   

[bozoh]

i created a issue report in moodle tracker site, it's seems not be realted to my code but some changes in moodle_34 and moodle_35

please vote into it
https://tracker.moodle.org/browse/MDL-63180

[bozoh]

i created a issue report in moodle tracker site, it's seems not be realted to my code but some changes in moodle_34 and moodle_35

please vote into it
https://tracker.moodle.org/browse/MDL-63180