NEW ORLEANS (AP) — Opening day glitches were apparent as the online insurance marketplaces at the heart of the national health care overhaul opened.

A spokesman for Blue Cross and Blue Shield of Louisiana — one of four companies providing insurance through the exchange in Louisiana — said no one among about a dozen testers of the system was able to complete a transaction Tuesday morning. Company spokesman John Maginnis said the insurer is advising people trying to access the system to relax, noting the enrollment period lasts six months.

In a state where President Barack Obama’s popularity is low, supporters of the health law he championed tried to educate the uninsured about the new availability of insurance.

Democratic Rep. Cedric Richmond of New Orleans circulated emails and links to online sign-up instructions.