u/Much-Package8236

Car was off the road for a couple weeks whilst I sorted the kit. Got it all together and now I have loads of lights flashing on the dash. Eml code 21 and 24, both airbag lights continuously flashing and also an abs light. All came at once. Tried clearing them and all came back. Battery's all good and I pulled the ecu and from what I could see it all seems okay. Smells a little off but looked near immaculate. Any ideas?