Prestashop 1.5.4.1 pantalla en blanco

[CloniKa]

Buenas tardes,

 

cada vez que agrego un producto en el back office y le doy a guardar cambios tarda muchisimo y al final me da a veces pantalla en blanco, a veces se guarda y otras este error (he activado para que me enseño los errores):

 

Fatal error: Uncaught exception 'UnexpectedValueException' with message 'RecursiveDirectoryIterator::__construct(/mnt/webc/d0/50/53839850/htdocs/cache/smarty/cache/blockcategories/0/1/1/1/146/0/a3/98): failed to open dir: Interrupted system call' in /mnt/webc/d0/50/53839850/htdocs/tools/smarty/sysplugins/smarty_internal_cacheresource_file.php:180 Stack trace: #0 [internal function]: RecursiveDirectoryIterator->__construct('/mnt/webc/d0/50...', 0) #1 /mnt/webc/d0/50/53839850/htdocs/tools/smarty/sysplugins/smarty_internal_cacheresource_file.php(180): RecursiveDirectoryIterator->getChildren() #2 /mnt/webc/d0/50/53839850/htdocs/tools/smarty/Smarty.class.php(772): Smarty_Internal_CacheResource_File->clear(Object(Smarty), '/mnt/webc/d0/50...', NULL, NULL, NULL) #3 /mnt/webc/d0/50/53839850/htdocs/classes/Tools.php(2132): Smarty->clearCache('/mnt/webc/d0/50...', NULL, NULL) #4 /mnt/webc/d0/50/53839850/htdocs/classes/module/Module.php(1671): ToolsCore::clearCache(Object(Smarty), '/mnt/webc/d0/50...', NULL, NULL) #5 /mnt/webc/d0/50 in /mnt/webc/d0/50/53839850/htdocs/tools/smarty/sysplugins/smarty_internal_cacheresource_file.php on line 180

 

que hago?

 

gracias!