My problem has now been resolved by the helpdesk people at IXWebhosting. I thought you might be interested to know how they did it:
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I decided to make sure that fresh WordPress installation is working fine and installed it into https://being-in-voice.com/webblog/ (a new directory). Then I discovered that there is the same login issue as you experienced. So, I have searched the Internet and finally found a solution mentioned at the following pages:
https://core.trac.www.ads-software.com/ticket/12142#comment:33
https://core.trac.www.ads-software.com/attachment/ticket/12142/12142.diff
In order to implement it I had to remove a code that is marked as dark green as you can see via https://core.trac.www.ads-software.com/attachment/ticket/12142/12142.diff from the folloeing pages:
/being-in-voice.com/webblog/wp-login.php
/being-in-voice.com/webblog/wp-includes/general-template.php
/being-in-voice.com/webblog/wp-includes/pluggable.php
After that I was able to access https://being-in-voice.com/webblog/wp-admin page using your login credentials:
Then I tried to implement the same solution for https://www.being-in-voice.com/blog/ but found that it is still not accepting passwords. Moreover, I found that it does not send passwords using “Forgot Password” link (in https://being-in-voice.com/webblog this option works fine).
According to this, I decided to create a backup of the following tables that belong to ‘flloyd2_beingblog’ database:
#wp_commentmeta
#wp_comments
#wp_postmeta
#wp_posts tables
and restore them into flloyd2_flloyd2_webblogtest database I used for /being-in-voice.com/webblog/ blog.
If you check https://being-in-voice.com/webblog/ URL, you will see that it shows your blog as well as all the posts and commends. There is also no problem with admin login.
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As she says, everything works fine, but we had to create a completely new directory to do it.
And my media files have pretty much disappeared! Some of them appear on the blog pages, but in the gallery there are a lot of broken links.
Hey ho. I will now set everything up again.
Thanks for all the offers of help. Much appreciated.