I'm experiencing the same issue on my laptop. So far, I've found this link on the ubuntu forum (since elementary hera is based on Ubuntu 18.04):
Also, found those two bugs registered at Ubuntu's Lauchpad:
I get the same thing but mine had to do with adding a 5600 xt and the radeon drivers in 5.3 not working. Installing 5.4 fixed the issue. Too do this boot to 5.1 and install ukuu and use it too install 5.4 I haven't tried 5.5.