When I try to log onto OctoRemote I get "Authorisation failed. Check API key
What did you already try to solve it?
I rescanned to API
Have you tried running in safe mode?
N/A
Did running in safe mode solve the problem?
NM/A
Complete Logs
octoprint.log, serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support! Not log excerpts, complete logs.)
This is probably an issue with your printer or your printer's firmware and not OctoPrint. An issue we might be able to help you with, but not unless we have to extract every single piece of information with pliers from your nose.
Logs always are your friend. Enable serial.log, reproduce the issue, share the resulting log and octoprint.log. Try safe mode. Follow any links if you need to know more.
There may be a plugin interfering - if you go back to normal mode and the issue occurs still, then you need to hunt down the either bugged plugin, or maybe it is misconfiguration in a plugin.
Or, like you said earlier it could be tempremental due to bad connections or something on the printer.
Ewald, Charlie..... I will try these suggestions.... but not today!!!! Tomorrow... yes. Many many thanks for using your time to help..... I might need more tomorrow