Hi LeonidS 

Many thanks for your return. 

I did made it to migrate to the V12. In fact I had to import a fresh sys_pages_blocks table from a new V11.0.3 just installed. Then all icons on the dashboard reappears (Upgrade, cache, audit, ..) ! So I did ask for the upgrade. It did it during the nigt, ut the result is a mess 

V12 :

• Impossible to update modules => “File transfer failed, please check permissions” (All folders are ok 755, and all files are on 644)
• A lot of Key string appears showing no traduction
• While connected with admin account : sometimes appears a blank screen with “Database query error” then a CRTL F5 gives back the normal page - (whatever emptying UNA cache) - while not connected homepage appears, while connected with other account => “Database query error”, …

So I decided to go back to the V11.0.3

The website is actually on V11.0.3 and I have those bugs :

• Dashboard had no udate button or possibility to access to cache options (some buttons missing)
• When importing a sys_page_block from a new installation, then it reappear
• When Trying to insert a cover picture for event -> nothing happends (upload seems not to function or was an error)
• An loading on the bottom of the Homepage stay without nothing that happends

I feel like it is better to resolve some issue on the V11.0.3 first !

What is you advices, suggestions ?

Many thanks