title: How to fix gradle error in android studio?
body: <p>Build environment</p>
  <ul>
  <li>Android Studio (Arctic fox 2020.3.1 Patch 2) in Ubuntu 18.04</li>
  </ul>
  <p>I updated grade from 4.1.0 to 7.0.1.
  After that, gradle build error problem happens in android studio as follows.</p>
  <pre><code>Could not resolve all dependencies for configuration 'classpath'.
  &gt; Using insecure protocols with repositories, without explicit opt-in, is unsupported. Switch Maven repository 'maven(http://10.252.250.53:8081/lm/content/groups/public/)' to redirect to a secure protocol (like HTTPS) or allow insecure protocols. See https://docs.gradle.org/7.0.2/dsl/org.gradle.api.artifacts.repositories.UrlArtifactRepository.html#org.gradle.api.artifacts.repositories.UrlArtifactRepository:allowInsecureProtocol for more details. 
  </code></pre>