How to fix the problem when I upgrade from 1.9 to 2.2 version ?
FYI. The database has 10 GB size and it tooks long time to upgrade and after I wait for it, error appear as seen as attachment.
Please help me guys.
Thank you
This sounds like MDL-8720
Did you, first, upgrade to the final version of 1.9 (1.9.19 iirc)? This is always a good idea to ensure you have a clean(ish) 1.9.
no, i did not
It may be safest to restore your 1.9 site from backup and do it again then.