Error ufter upgrade to 5.0

[cibo001]

I did upgrade from last 4. version to new 5. version.
All message to ok in the steps.

I have this errors log from several page ( not all in every page, all at the top in administrating home page):

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Notice: Undefined index: LBL_MANAGE_LOCALE in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 190

Notice: Undefined index: LBL_MANAGE_LOCALE in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 192

Notice: Undefined index: LBL_LOCALE in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 199

Notice: Undefined index: LBL_STUDIO in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 190

Notice: Undefined index: LBL_STUDIO in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 192

Notice: Undefined index: LBL_STUDIO_DESC in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 199

Notice: Undefined index: LBL_CONFIGURE_GROUP_TABS in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 190

Notice: Undefined index: LBL_CONFIGURE_GROUP_TABS in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 192

Notice: Undefined index: LBL_CONFIGURE_GROUP_TABS_DESC in c:\programmi\easyphp1-8\www\crm\modules\Administration\index.php on line 199
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I did make all activity to rebuilt relatinships, extensions, etc.

I attach diagnostic file for complete info.
I hope someone can help me or I must return to prior version.