Error: CertPathValidationExeption. Trust anchor for cert path not found [and suggest a definite requirement]

[WillemsenGithub]

Error: When entering credentials Error: CertPathValidationExeption. Trrust anchor for cert path not found

LineageOS 19 NC 28 Server, works like a charm

Guess issue is caused by a Custom Certificate. Maybe. The Readme here describes how to enter that in Android, but cant find it in LineageOS.

Some Android apps simply ask you to accept a Custom cert, would be nice default functionality.