After digging deeper into the starce log, I found the following:
Due to some unknown reason, the clearml server has directed me to port 8015 (and this is only happening on one network, I have tested two different computers on this network, both behave the same). Outside the network, everything works correctly.

connect(3, {sa_family=AF_INET, sin_port=htons(8008), sin_addr=inet_addr(…..
poll([{fd=3, events=POLLOUT|POLLERR}], 1, 3000) = 1 ([{fd=3, revents=POLLOUT}])
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
poll([{fd=3, events=POLLOUT}], 1, 3000) = 1 ([{fd=3, revents=POLLOUT}])
sendto(3, "GET /auth.login ……) = 402
ioctl(3, FIONBIO, [1]) = 0
poll([{fd=3, events=POLLIN}], 1, 10000) = 1 ([{fd=3, revents=POLLIN}])
recvfrom(3, "HTTP/1.1 302 Found\r\nLocation: None \r\nConnection: close\r\nX-Frame-Options: SAMEORIGIN\r\nX-XSS-Protection: 1; mode=block\r\nX-Content-Type-Options: nosniff\r\nContent-Security-Policy: frame-ancestors 'self'\r\n\r\n", 8192, 0, NULL, NULL) = 232