ERROR CARGANDO NOTA DE EXAMEN

Buenas, me arroja este mensaje de error Apache cuando intento cargar nota de exámen final. Los permisos ya están dados. Que puede ser?

[Thu Apr 01 00:18:35.798132 2021] [php7:warn] [pid 430412] [client 192.168.0.1:57158] PHP Warning: file_put_contents(/usr/local/proyectos/g3w317/instalacion/log/des01/20210401_001835___4355.log): failed to open stream: Permission denied in /usr/local/proyectos/g3w317/vendor/siu/chulupi-framework/src/SIU/Chulupi/util/log/log.php on line 276, referer: http://192.168.1.125/ucp/zona_examenes
[Thu Apr 01 00:18:36.533081 2021] [php7:warn] [pid 430414] [client 192.168.0.1:57164] PHP Warning: file_get_contents(/usr/local/proyectos/g3w317/instalacion/log/des01/20210401_001835___4355.log): failed to open stream: No such file or directory in /usr/local/proyectos/g3w317/src/siu/extension_kernel/log.php on line 98, referer: http://192.168.1.125/ucp/notas_mesa_examen/edicion/7e5d9cfcb5f360a5b210cba2e1114da8a62cdb6dd1bd5559eeaee21d9e7a962bdf16d2b072fe866f
[Thu Apr 01 00:18:38.902770 2021] [php7:warn] [pid 430412] [client 192.168.0.1:57158] PHP Warning: file_put_contents(/usr/local/proyectos/g3w317/instalacion/log/des01/20210401_001838___9925.log): failed to open stream: Permission denied in /usr/local/proyectos/g3w317/vendor/siu/chulupi-framework/src/SIU/Chulupi/util/log/log.php on line 276, referer: http://192.168.1.125/ucp/zona_examenes
[Thu Apr 01 00:18:45.695921 2021] [php7:warn] [pid 430428] [client 192.168.0.1:57168] PHP Warning: file_put_contents(/usr/local/proyectos/g3w317/instalacion/log/des01/20210401_001845___7938.log): failed to open stream: Permission denied in /usr/local/proyectos/g3w317/vendor/siu/chulupi-framework/src/SIU/Chulupi/util/log/log.php on line 276, referer: http://192.168.1.125/ucp/zona_examenes/home/72807a1f67648163d93bdb8f1c1c0c0ddd6fa6b3d43675b0339e476ddec4a1ea535fac3a6bdca1a7
[Thu Apr 01 00:18:48.240039 2021] [php7:notice] [pid 430427] [client 192.168.0.1:57170] PHP Notice: Array to string conversion in /usr/local/proyectos/g3w317/vendor/siu/chulupi-framework/src/SIU/Chulupi/util/modelo/ProcesadorDatos.php on line 167, referer: http://192.168.1.125/ucp/notas_mesa_examen/edicion/7e5d9cfcb5f360a5b210cba2e1114da8a62cdb6dd1bd5559eeaee21d9e7a962bdf16d2b072fe866f
[Thu Apr 01 00:18:48.273438 2021] [php7:warn] [pid 430427] [client 192.168.0.1:57170] PHP Warning: file_put_contents(/usr/local/proyectos/g3w317/instalacion/log/des01/20210401_001848___5025.log): failed to open stream: Permission denied in /usr/local/proyectos/g3w317/vendor/siu/chulupi-framework/src/SIU/Chulupi/util/log/log.php on line 276, referer: http://192.168.1.125/ucp/notas_mesa_examen/edicion/7e5d9cfcb5f360a5b210cba2e1114da8a62cdb6dd1bd5559eeaee21d9e7a962bdf16d2b072fe866f
[Thu Apr 01 00:18:54.512411 2021] [php7:warn] [pid 430432] [client 192.168.0.1:57178] PHP Warning: file_put_contents(/usr/local/proyectos/g3w317/instalacion/log/des01/20210401_001854___7379.log): failed to open stream: Permission denied in /usr/local/proyectos/g3w317/vendor/siu/chulupi-framework/src/SIU/Chulupi/util/log/log.php on line 276, referer: http://192.168.1.125/ucp/notas_mesa_examen/edicion/7e5d9cfcb5f360a5b210cba2e1114da8a62cdb6dd1bd5559eeaee21d9e7a962bdf16d2b072fe866f