SOLUCTION Xamarin - Unable to build project (XA0031 - Java SDK 11 or above is required...)

Hello Jorge Loor,

Thank you for reaching Rider Forum. 

Could you please let me know the following details: 

1. Could you please reproduce the issue and collect the full log bundle so we could take a closer look at the case? Please upload them to our shared storage at https://uploads.jetbrains.com and provide me with the ID of the upload;
2. Screenshot of the Settings | Build, Execution, Deployment | Toolset and Build;
3. Screenshot of the Settings | Environment.

Thank you in advance! Looking forward to hearing from you soon. 

Just download the jdk 11 in windows then copy the path where you install the jdk then in rider paste the path of the sdk there it worked for me