Thanks to rolandtom and Si, I have been able to fix the Tag filtering issue with the modification
of
tag.chunk.tpl
But what about the Archives filtering issue ?
You have to amend
row.chunk.tpl file in core/components/archivist/elements/chunks/
<li class="[[+cls]]">
<a href="Your Blog Name or Blog Container Alias[[+url]]" title="[[+date]]">[[+date]] ([[+count]])</a>
</li>
Go next in "System settings" > "Friendly URL" > "Container Suffix"
and put / as a value into Container Suffix.
Clear the Cache.
And my Archives filter has been fixed.
By the way I kept the original ht.access without any change.