Cannot establish a TOR Browser session

Whn I attempt to establish a TOR Browser session in the morning, I usually have success. However, whenI try to reestablish contact in the afternoon, I failed with the message;

Tor failed to establish a Tor network connection

Establishing an encrypted connection failed (done 128.31.0.34.9101).

I have tried re-booting several times and it makes no difference. Why does Tor work in the a.m, but invariably fails in the p.m.

I am working in the UK on GMT. I running under wonderful Windows 10 (NOT!).

David T-C.

Trac:
Username: DavidTC44