Picture to Event Upload = ERROR 0 Call to a member function format() on bool

Good Afternoon McKillo
No, i did according to the Update to Jem4 Instructions first 2.3.6 but i really use JEm since long Time, i think since joomla 2.5.

Many Thanks for the SQL Script, i did this Succesfully via MySql Admin:
UPDATE xxxxx_jem_categories = 1 Entry Change (have 2 Categories)
UPDATE xxxxx_jem_events = 4 Entry Change (have 25 Events)
UPDATE xxxxx_jem_venues = 1 Entry Change (have 4 Venue)
So some was Ok, some not.

So again, many Thanks an i will furter Testing with this from 2.3.6 Updatet to JEM4.

Best Regards, Marcel

In my case I have the same error notice when I edit in frontend an existing event. Now I found that this problrm only exists when I have german language in frontend!
Can you test if this is in your case too. Thanks

Hello JoJo
No, since im did this Set Flag in the DB (recurrence_limit_date: Set Tick on DATE and Save >> Post #30559 )
this Errror not more shown, also not with German Language (I still have the 2.3.6 Language)
Now Editing works fine, can Add and Delete Picture, Files. Save without Change Anything also works now.

Best Regards, Marcel

Tested with JEM4, works now perfect, Thank You, for me is it solved