fopen(...): Failed to open stream: Permission denied

I am using laravel 10 (just for API) and vue. The web application is running on a IIS server.

I am getting an error quite often:

production.ERROR: fopen(D:\Projects\TestProject\storage\framework/cache/data/e9/7d/e97d811f085318637cdcda703b63e4dc6269d1c3):
Failed to open stream: Permission denied {"exception":"[object] (ErrorException(code: 0): fopen(D:\\Projects\\TestProject\\storage\\framework/cache/data/e9/7d/e97d811f085318637cdcda703b63e4dc6269d1c3):
Failed to open stream: Permission denied at D:\\Projects\\TestProject\\vendor\\laravel\\framework\\src\\Illuminate\\Filesystem\\LockableFile.php:69)


I don't know how to fix it...

I gave storage/framework/cache/data folder full permissions for the IUSR group and IIS_IUSRS (my_domain\IIS_IUSRS) but nothing... still getting the error.

Anyone have any idea how to fix this?

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