If you are going to use IMS LTI 2.0 in Sakai 10.x and later, you will need to define a number of variables in your sakai.properties as defined in the LTI 2.0 documentation:
http://www.imsglobal.org/lti/ltiv2p0/ltiIMGv2p0.html
lti2.guid=
lti2.support_email=
lti2.service_owner.id=
lti2.service_owner.owner_name=
lti2.service_owner.description=
lti2.service_owner.support_email=
lti2.service_provider.id=
lti2.service_provider.provider_name=
lti2.service_provider.description=
lti2.service_provider.support_email=
lti2.product_family.product_code=
lti2.product_family.vendor_code=
lti2.product_family.vendor_name=
lti2.product_family.vendor_description=
lti2.product_family.vendor_website=
lti2.product_family.vendor_contact=
lti2.product_info.product_name=
lti2.product_info.product_version=
lti2.product_info.product_description=