Add Network Sites are not working

I have my website for tests. I added a Network and now I have 2 blogs. The second blog is in a subdirectory store as you can see in the screenshot.

Now, if I open the store it seems the theme is missing.

but also, if I click on Dashboard the page store/wp-admin is not found.

I changed the wp-config.php and the web.config as the instructions.

Here the webconfig

rewrite
    rules
        rule name=WordPress Rule 1 stopProcessing=true
            match url=^index\.php$ ignoreCase=false /
            action type=None /
        /rule
        rule name=WordPress Rule 2 stopProcessing=true
            match url=^([_0-9a-zA-Z-]+/)?wp-admin$ ignoreCase=false /
            action type=Redirect url={R:1}wp-admin/ redirectType=Permanent /
        /rule
        rule name=WordPress Rule 3 stopProcessing=true
            match url=^ ignoreCase=false /
            conditions logicalGrouping=MatchAny
                add input={REQUEST_FILENAME} matchType=IsFile ignoreCase=false /
                add input={REQUEST_FILENAME} matchType=IsDirectory ignoreCase=false /
            /conditions
            action type=None /
        /rule
        rule name=WordPress Rule 4 stopProcessing=true
            match url=^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) ignoreCase=false /
            action type=Rewrite url={R:1} /
        /rule
        rule name=WordPress Rule 5 stopProcessing=true
            match url=^([_0-9a-zA-Z-]+/)?([_0-9a-zA-Z-]+/)?(.*\.php)$ ignoreCase=false /
            action type=Rewrite url={R:2} /
        /rule
        rule name=WordPress Rule 6 stopProcessing=true
            match url=. ignoreCase=false /
            action type=Rewrite url=index.php /
        /rule
    /rules
/rewrite

How can I fix it?