Cannot user access my router [COSED}

[dev4openid]

Hi,
I upgraded my OPNSense router a few days before Christmas.  I have been using PNSense for a year. It has been brilliant.
Although my experience has been IT apps, I have been learning slowly about network - newbie.

I configured the box for root and 1 user. In both cases, they both have long PWD and I have enabled TOTP.
SSH is also enabled.

The network runs and I can connect any to site as usual. However, it seems over time the network slows down (especially the later releases) - I am using the network now. A reboot solves this for approx 2 week period.

I have just rebooted and I cannot login via browser console OR ssh.  This was the case just before the reboot as well.
I use KeepassXC with browser plugin usually and have had no problems.  I have attempted manually but no go.
<---EDIT---->
Well, I eventually killed it off and rebuilt the installation - now seemingly works -  well almost - the TOTP part is all over the place and unreliable.   CLOSED

I looked at GUI crashed? "SSH unavailable. Can I restore from backup?"  post - seems almost a dup. He cannot SSH either but can access GUI -  I cannot as it times out

Any help appreciated (as I am not an expert)

[cookiemonster]

Configuration problem would result in symptoms appearing immediately, normally.
Hardware problems can't be discounted yet. You need to provide details of your hardware and setup to have an idea what to explore.