Error memory empty or no communication

Hi,
I've installed my third VP44. Ro80 sends greetings.
After the bleeding process proved to be a bit more complicated than usual this time, the preheating indicator light started flashing continuously.
Error codes as listed in the title. No issues with main control units or basic settings. Onboard voltage is okay.
After a 30 km test drive and several starts, an error code eventually appeared in the system's memory, listing all the issues that had occurred in the past few days. After deleting, the lamp was also off.

Question: Why couldn't I access the error memory initially? Is the MSG about to give up the ghost now too?