Answers.Body: <p><strong>Update</strong></p>
  
  <p>This has been implemented for the upcoming Craft 3.1 release.</p>
  
  <hr>
  
  <p>Currently Live Preview will only work across sub-domains (i.e. site1.domain.com and site2.domain.com), not completely different domains (site1.com and site2.com) 
   Here's a guide on how you'd set that up: <a href="https://craftcms.com/guides/using-live-preview-across-multiple-subdomains" rel="nofollow noreferrer">https://craftcms.com/guides/using-live-preview-across-multiple-subdomains</a></p>
  
  <p>In order for it to work across completely different domains, <a href="https://github.com/craftcms/cms/issues/1521" rel="nofollow noreferrer">https://github.com/craftcms/cms/issues/1521</a> will need to be implemented.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-04-11T12:42:31.393Z
Answers.Text: I am running Craft 3.1.18 and unable to use Live Preview on a multi Site. Admin url: domain.com/admin
  Site A: domain.com - working live preview
  Site B: domain.in - Error: Access to XMLHttpRequest at 'https://www.domain.in/?token=sv4HhcvPB8XScTzDXY-pJn-wboiyLR9T' from origin 'https://www.domain.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header contains multiple values 'https://www.domain.com, *', but only one is allowed.
Answers.UserDisplayName: Mark
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-06-03T15:48:06.880Z
Answers.Text: I'm having the same issue. Were you able to sort this?
Answers.UserDisplayName: mijewe
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-22T17:37:00.817Z
Answers.LastActivityDate: 2018-11-22T00:04:41.507Z
Answers.LastEditDate: 2018-11-22T00:04:41.507Z
Answers.UserDisplayName: Brad Bell
Answers.Body: <p>I have updated to craft 3.1.7
  I can only see live preview on homepage of add on domain. Other entries do not have live preview available</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-02-04T16:00:21.063Z
Answers.LastActivityDate: 2019-02-04T16:00:21.063Z
Answers.UserDisplayName: joomkit
Body: <p>In the multi-site Live Preview in admin panel show error in the console.</p>
  
  <blockquote>
    <p>Failed to load <a href="http://www.example.local/test" rel="nofollow noreferrer">http://www.example.local/test</a>: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin '<a href="http://www.example.test" rel="nofollow noreferrer">http://www.example.test</a>' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.</p>
  </blockquote>
  
Tags: <craft3><htaccess>
Title: Multi-site Live Preview not working in Craft 3
ThreadText: # Multi-site Live Preview not working in Craft 3
  
  (Asked by: username_0 on 2018-10-22)
  
  In the multi-site Live Preview in admin panel show error in the console.
  
  > Failed to load <http://www.example.local/test>: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '\*' when the request's credentials mode is 'include'. Origin '<http://www.example.test>' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
  
  **Tags:** craft3, htaccess
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_1 on 2018-10-22. Score: 1
  
  **Update**
  
  This has been implemented for the upcoming Craft 3.1 release.
  
  ---
  
  Currently Live Preview will only work across sub-domains (i.e. site1.domain.com and site2.domain.com), not completely different domains (site1.com and site2.com)
  Here's a guide on how you'd set that up: <https://craftcms.com/guides/using-live-preview-across-multiple-subdomains>
  
  In order for it to work across completely different domains, <https://github.com/craftcms/cms/issues/1521> will need to be implemented.
  
  > **Comments:**
  > **username_2**: I am running Craft 3.1.18 and unable to use Live Preview on a multi Site. Admin url: domain.com/admin Site A: domain.com - working live preview Site B: domain.in - Error: Access to XMLHttpRequest at 'https://www.domain.in/?token=sv4HhcvPB8XScTzDXY-pJn-wboiyLR9T' from origin 'https://www.domain.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header contains multiple values 'https://www.domain.com, *', but only one is allowed.  
  > **username_3**: I'm having the same issue. Were you able to sort this?  
  
  ---
  
  ### Answer by username_4 on 2019-02-04. Score: 0
  
  I have updated to craft 3.1.7
  I can only see live preview on homepage of add on domain. Other entries do not have live preview available
  
  
  ---
  
  