SelfSigned Problems with Android

Hi all,
I got Bitwarden running on a raspberry, and I can access the vault securely from my Windows PC and Macbook by importing the certificate into Chrome. My Android phone however is protesting: “ Trust anchor for certification path not found”. It seems that Android has recently tightened the rules for handling self signed certificates. Is that true; any work arounds for this?
Thx, PPee

I’m the same problem
I hope an issue
I use the SSL of QNAP

The workaround is using a valid certificate.