Hi @deepreef11
I’m also facing the same problem with no solution yet. When testing with LOS or LOS with microG this Problem doesn’t exist there.
It seems that in /e/OS the self installed CA certificates are not trusted by 3rd Party apps. Besides Homeassistant also Firefox doesn’t trust ist. But the /e/OS internal browser seems to trust them. So it’s weired but not related to the apps itself nor the installed CA certificate.
I raised this questions some months ago but couldn’t find any helping solution or workaround.