Notice & Warnings: when adding a new field to a new content-type

When adding a new field with a schema.org property assigned to it to a new content-type the following Notice and Warnings are displayed:

Notice: Undefined index: field_url in schemaorg_field_ui_field_edit_form_submit() (line 124 of ../sites/all/modules/schemaorg/schemaorg.module).

Warning: array_filter() expects parameter 1 to be array, null given in schemaorg_terms_merge() (line 159 of ../sites/all/modules/schemaorg/schemaorg.module).
 
Warning: array_unshift() expects parameter 1 to be array, null given in schemaorg_terms_merge() (line 164 of ../sites/all/modules/schemaorg/schemaorg.module).