WhatsApp linking of Android and PC

During the last couple of weeks, I have started experiencing very frequent disconnections between WhatsApp on my Android and my PC. Further, the remedy of logging out and scanning with my Android the QC code on my PC screen also very often has not been working.

WhatsApp has provided several possible solutions. I have tried all of them, including restarting my PC, newly downloading WhatsApp for Windows, and so on, with no success at all.