Logging into a website I use frequently. Enter password, clicking Enter. Here is the unexpected: Gettin just a weak glimpse, then password field is blanked. Installed new batteries. Entered password again, still does no work. I do not get any further, it seems. I did not get back to the log in field.
So I reinstalled OS. When completed, i got back to the password box for login again. Does not get passing this point it seems.
This situation is a first time for me...
Ouch, wrong password you have been talking about...
This has nothing to do with computer user password you asked for help to change. Computer user password authenticates user to run the computer - it is the one you use to log in when you boot computer or when computer wakes from sleep. You change it either by command you indicated or through the Preferences.
You have problem with password for a
specific web page. That is quite common problem...
But this is different password - specific for that one web page. This password should really be different from computer password (and any other web page you are using). This password authenticates you to use that web page.
If you used same password from computer and web page, changing password on the computer had no impact on password for the web page and that page should still use your old password. The web page it self should have way to change the password there...
If you cannot log in (with old password) and see weird behavior, you see likely some kind of compatibility issue between you computer and the web page code. I have seen it quite a bit recently. My solution is to use different web browser to access that web page. Safari is Mac specific and some pages may use methods which Safari does not support or blocks. If you try Chrome or Firefox, those are cross platform browsers and you have better chance these things work.
Just yesterday I was accessing page which always used to work in Safari, but Apple upgraded Safari recently and now it does not work. I had to use Chrome and all was working as before. I have Safari, Chrome, and Firefox all installed on my computer. Safari is the main one, others are used when Safari fails.