Hi,

Just try and edit model/custom/Project.php
There should be 2 lines starting with 

public $_tab_2_2

Comment the one that should be unexpected.
The correct one should look like that

  public $_tab_2_2 = array('start', 'end', 'morning', 'afternoon');
  public $startAM;
  public $endAM;
  public $startPM;
  public $endPM;

Jsut to fix source of issue :
Which version of Projector are you using, and wich version of the Screen Customization plugin ?

I'm using 9.5.5 and the last version of customization now

I'm updating everything and trying to fix every error i get before trying the 10.0 on a test server

This is what I have on the lines

public $_tab_2_2=array('start','end','morning','afternoon');
public $_sec_Synchronisation;
public $_spe_isSynchronised;
public $_sec_ProjectDailyHours;
public $_tab_2_2;
public $startAM;
public $endAM;
public $startPM;
public $endPM;
public $idCatalogUO;

There is more above but this is the relevant " public $_tab_2_2" i could find

The fix is to replace what you posted with

//public $_tab_2_2=array('start','end','morning','afternoon');
public $_sec_Synchronisation;
public $_spe_isSynchronised;
public $_sec_ProjectDailyHours;
public $_tab_2_2=array('start','end','morning','afternoon');
public $startAM;
public $endAM;
public $startPM;
public $endPM;
public $idCatalogUO;

It worked

Screen customization still told me I had errors so i looked if I had custom fields but it is just some field I had hid for clarity

I just used the reset function at the top and it works perfectly after

I'll try to re-hide those fields now that it is functionnal again

Thank you