I'm not the person to help - Google suggests this is a Python error and I don't use Python. Google also suggests that it's often connected with access through a proxy server - not a situation I'm in.
"any other info from me" - well, you might post if you were going through a proxy server, and if so if you'd tried some network testing e.g. connecting to different sites, using specific ports, and different protocols e.g. http, https, telnet etc. You might also give an example of the code to show any functions / libraries you're using too.
Again, it's not my field but would something like the following give you some direction?
After all that, if you think it's an issue to do with the Companies House API / servers, they'd probably want to see some examples of which of their endpoints / uris you're using and which parameters you're passing, and (if you think it's a network issue) the URIs / IP addresses at your end.