Persistent Notice: Undefined index: when changing relationships

Testing Erpal-Platform I see strange errors.
Drupal 7.37 -ERPAL Platform (erpal_platform-7.x-1.0-alpha10)
Mysql 5.6.16
PHP 5.5.20
PHP Memory limit 512M

I created a some companies and individuals. Creating a relationship between companies goes fine. Then I changed the crm_membership in a bit because someone can be a 'member' of a company (like voluntary work) , 'household' is not relevant to me. The format chose is unique.

After creating the association "person A is a member of company X' it is properly written to the database, green accepted box. However, when I go to the user-edit area I see persistently the following twice appearing flagging red. It persistently disappears after a few refreshes.

Notice: Undefined index: relation_endpoint_bundle_display in relation_add_field_widget_form() (line 753 [myserverpath]profiles/erpal_platform/modules/contrib/relation_add/relation_add.module).

I also get sometimes dozens of "Notice: Undefined index:" when I update modules. But after page refreshed to get less and refreshing again they disappear, and happens a lot in other areas also, seems random.

To test I created a new crm_seller entry for a relationship between company<>individual and selling people (set to unique), then I get about 35 entries like this:

Notice: Undefined index: module in FieldInfo->prepareInstanceWidget() (line 591 of [myserverpath]/modules/field/field.info.class.inc).
Notice: Undefined index: module in FieldInfo->prepareInstanceWidget() (line 626 of [myserverpath]/modules/field/field.info.class.inc).
Refresh and is reduced to 21 lines.
Notice: Undefined index: module in FieldInfo->prepareInstanceWidget() (line 591 of [myserverpath]/modules/field/field.info.class.inc).
Notice: Undefined index: module in FieldInfo->prepareInstanceDisplay() (line 626 of [myserverpath]/modules/field/field.info.class.inc).
Again it does not appear the database is damaged.

Should I ignore the errors and set in admin the reporting on the screen to something which suppresses it? Or is is a serious flaw?