Fatal error: Uncaught Error: Interface "Magento\Framework\Setup\InstallSchemaInterface" not found in /home/airtimer/public_html/app/code/Magiccart/Testimonial/Setup/InstallSchema.php:20 Stack trace: #0 {main} thrown in /home/airtimer/public_html/app/code/Magiccart/Testimonial/Setup/InstallSchema.php on line 20