Can’t reset password

Hi guys

My wordpress site: https://cyonix.co.uk/wordpress/ (in dev)

I’ve recently tried to reset my password to login to wordpress admin with no success.

I followed the ‘forgot password’ link and entered my email address, which proceeded to send me an email with a link to follow. Alll good so far but the link takes me to a page with the message ‘Sorry, that key does not appear to be valid.’ and prompts me to re-enter my user or email. This takes me round in circles. I know I should upgrade to 2.6 but can’t get in to do it!

Am I being stupid and missing something here?

I hope somebody can help me ??

Thanks
Sharon