I am experiencing the ‘invalidkey’ issue on one of my client’s sites. They are running WP 4.4.2 and TML 6.4.4. There are no caching plugins installed, but the client is using a WP host. So as suggested, I had the host disable all server-side caching on the /resetpass and /lostpassword pages. However the invalidkey issue persists. Are there any other known issues that could be causing this? Or other potential solutions that I can try out?
Thanks