enable iis error

 Enable full errors by adding this to web.config inside <system.webServer>:

<httpErrors errorMode="Detailed" />

full web.config

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

  <system.webServer>

    <rewrite>

      <rules>

        <rule name="WordPress Rule" stopProcessing="true">

          <match url=".*" />

          <conditions logicalGrouping="MatchAll">

            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />

            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />

          </conditions>

          <action type="Rewrite" url="index.php" />

        </rule>

      </rules>

    </rewrite>

    <directoryBrowse enabled="false" />

    <httpErrors errorMode="Detailed" />

  </system.webServer>

</configuration>

✅ Required PHP Extensions for WordPress

Make sure these are enabled in your php.ini:

✔ extension=mysqli

✔ extension=gd

✔ extension=mbstring

✔ extension=curl

✔ extension=openssl

✔ extension=json (usually built-in)

✔ extension=zip

✔ extension=xml

✔ extension=exif

Without these, WordPress can show:

HTTP 500 Internal Server Error

“Error establishing database connection”

Blank white screen

Theme/plugin errors