Fatal error: Uncaught Error: Interface "OpenSpout\Writer\WriterInterface" not found in /home/andinaes/public_html/aulavirtual/lib/openspout/src/Writer/AbstractWriter.php:11 Stack trace: #0 {main} thrown in /home/andinaes/public_html/aulavirtual/lib/openspout/src/Writer/AbstractWriter.php on line 11