from stacktrace it appears that connection to MIR server is being rejected for some reason. Looking at the "Examples" in the errors.ubuntu.com page, seems like the condition is when dialer is being invoked with url like "tel:///<phoneNumber>"
from stacktrace it appears that connection to MIR server is being rejected for some reason. Looking at the "Examples" in the errors.ubuntu.com page, seems like the condition is when dialer is being invoked with url like "tel:// /<phoneNumber> "