Hi guys,

I got this message when i launched Grav for the first time

RuntimeException thrown with message "Failed to write cache file "C:/wamp64/www/grav/cache/twig/ae/ae264e63cb578aa108549e1f405d5820c4b1 ad64a228a231655a9c884d5c93c8.php"."

Stacktrace:

13 RuntimeException in C:\wamp64\www\grav\vendor wig wig\lib\Twig\Cache\Filesystem.php:82

12 Twig_Cache_Filesystem:write in C:\wamp64\www\grav\vendor wig wig\lib\Twig\Environment.php:400

11 Twig_Environment:loadTemplate in C:\wamp64\www\grav\vendor wig wig\lib\Twig\Environment.php:347

10 Twig_Environment:render in C:\wamp64\www\grav\system\src\Grav\Common\Twig\Twig.php:340

9 Grav\Common\Twig\Twig:processSite in C:\wamp64\www\grav\system\src\Grav\Common\Service\OutputServiceProvide r.php:19

8 Grav\Common\Service\OutputServiceProvider:Grav\Common\Service{closure } in C:\wamp64\www\grav\vendor\pimple\pimple\src\Pimple\Container.php:113

7 Pimple\Container:offsetGet in C:\wamp64\www\grav\system\src\Grav\Common\Processors\RenderProcessor.p hp:17

6 Grav\Common\Processors\RenderProcessor:process in C:\wamp64\www\ grav\system\src\Grav\Common\Grav.php:121

5 Grav\Common\Grav:Grav\Common{closure} in C:\wamp64\www\grav\system\src\Grav\Common\Grav.php:383

4 Grav\Common\Grav:Grav\Common{closure} in C:\wamp64\www\grav\system\src\Grav\Common\Grav.php:359

3 call_user_func_array in C:\wamp64\www\grav\system\src\Grav\Common\Grav.php:359

2 Grav\Common\Grav:__call in C:\wamp64\www\grav\system\src\Grav\Common\Grav.php:122

1 Grav\Common\Grav:measureTime in C:\wamp64\www\grav\system\src\Grav\Common\Grav.php:122

0 Grav\Common\Grav:process in C:\wamp64\www\grav\index.php:45

Apache/2.4.18 (Win64) PHP/5.6.19
Windows 10 // Wampserver

Well that's a bit confusing, because it looks like a straight up permissions issue. However, you are running on windows so shouldn't have any permissions issues for the webserver creating the file.

I don't know enough about windows limitiations (of which there are many), but is it possible to try UniformServer instead of Wamp as I've tested that and it worked well.