I heard the UGLI™ oven is made of cardboard. Will it catch fire?

To quote President Roosevelt, Nothing to fear but fear itself.

The UGLI™ hybrid’s internal heat protection system is safe and is the same heating system as used for SunFocus® hybrid solar electric oven which has been used without incident for the past 7 years.

The heat systems consists of:
The 115v / 465W AC heating element vulcanized in high temperature silicone laid sandwiched between two metal sheets, surrounded by a 1000 degree F. thermal heat blanket, surrounded by 2 inches of thermal insulation. All the wiring is high temperature thermal coated and the wire connections are electrical tape covered. In addition the electrical system itself is electrical surge protected by a 7Amp fuse.