Wrong engine values – engine does not take gas

Hello, my Opel Combo often does not take any gas after starting the engine. No matter if winter or summer. At first the engine runs very restlessly to about 700 rpm – in this phase the accelerator does not react. After a certain waiting time (10 to 30sec) it then takes gas. I plugged in an OBD plug and I was told that the engine load runs to 100%, although I did not give gas. (see screenshot in annex) After that, when the engine ran round, the engine load fell to 50 %. What kind of mistake could that be? Opel Combo BJ 2014 – CDTI