Dear Friends,
I have an old website (http://trainings.iaec.eu) that needs to be upgraded. I have there old Joomla 3.7.5 and SEBLOD 3.11.2.
1. The firs problem in witch I stuck is upgrade to Joomla 3.8.10. When I try to upgare to the latest version of Joomla, the administrative part of the page becomes inaccessible and and I'm forced to erase everything and recover from old backup.
2. The second problem rises when I try to upgrade SEBLOD 3.11.2 to 3.16.2 first. In this case, an error appears on the first page of my website: "1054 Unknown column 'b.parent_inherit' in 'field list'" and in administration part "500 Unknown column 'a.parent_inherit' in 'field list' Unknown column 'a.parent_inherit' in 'field list'", when going to Components - SEBLOD - Form & Content Type Manager, but Joomla upgrades perfectly and everything else in administration site is OK, including additional Construction menu.
Any ideas how to get out of the situation?
Thank in advance for ideas and support !