can anybody help me with this please?
First, I'd try using the tool described here: https://docs.moodle.org/37/en/Administration_via_command_line#Fix_course_.2F_module_sequences.
[EDIT] Then I'd go close the eye on custom certificates and see if that is indeed the offending module. Then I'd trawl through this to find the solution for you: https://docs.moodle.org/37/enhttps://moodle.org/mod/forum/discuss.php?d=391844.
Your other post here makes it clear Custom Certificates is the issue. Are you using the correct version for your version of Moodle?
Hi James,
Thank you for your suggestions but when I click on the second link it says file not found....
Thank you for your suggestions but when I click on the second link it says file not found....
Sorry about that: https://moodle.org/mod/forum/discuss.php?d=391844
Please can you confirm how I go about finding out what version of custom certificate I'm using?
If you can still get to the plugin overview at Site admin > Plugins > Plugins overview it should be listed there. Otherwise check the actual plugin's folder for a file named version.php.