Soap dispenser won't open

Last year the latch broke on the soap dispenser. I replaced it and since then the lid will not open to release the soap. I bench tested the solenoid that actuates the latch and it works fine. The other issue I am having is that I get a message LO at the end of the cycle saying that the rinse aid is empty even when it is full. So today I replaced the main control board hoping it would cure these issues. But it didn’t. HELP! Any input or suggestions would be appreciated.