First try to check if OctoPrint/OctoPi is running at all:
Connect a HDMI monitor/TV to the Pi.
There should be a startup sequence.
If there is no startup sequence: Check the OctoPi installation on your SD card.
At the end of the sequence, if all went well, there is an IP address provided.
You can connect to OctoPrint with that IP address.
If there is a startup sequence, but no IP address, the WiFi settings seem to be wrong.
If you have the chance, connect the Pi with an Ethernet cable to your router and startup again.
If that works, you can login via SSH to the PI and correct the WiFi settings.
If you can't reach it, something is up with your network, at least I cannot see anything that hints at general server issues on either status or monitoring page.
Thank you, I can access it via my iPhone and iPad, but not through my pc running windows 10. I have a feeling it’s a network issue but I’ve tried everything except Ethernet to get around the issue.