SLIM APPLICATION ERROR - cannot add new nodes

[vveduvv]

Hello,

I've just moved all the labs and images from past unetlab versions to the new eve-ng. Everything is working fine, labs can be opened, nodes can be started... however when I try to add a new node to an existing lab I get the following error:

The application could not run because of the following error when pressing the button "save" at the "ADD A NEW NODE" pop-up:

DETAILS
Type: ErrorException
Code: 2
Message: touch(): Unable to create file /opt/unetlab/labs/Edu/Probes PBR.unl.lock because Permission denied
File: /opt/unetlab/html/includes/functions.php
Line: 775
TRACE
#0 [internal function]: Slim\Slim::handleErrors(2, 'touch(): Unable...', '/opt/unetlab/ht...', 775, Array)
#1 /opt/unetlab/html/includes/functions.php(775): touch('/opt/unetlab/la...')
#2 /opt/unetlab/html/api.php(864): lockFile('/opt/unetlab/la...')
#3 [internal function]: {closure}(Array)
#4 /opt/unetlab/html/includes/Slim/Route.php(468): call_user_func_array(Object(Closure), Array)
#5 /opt/unetlab/html/includes/Slim/Slim.php(1357): Slim\Route->dispatch()
#6 /opt/unetlab/html/includes/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#7 /opt/unetlab/html/includes/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#8 /opt/unetlab/html/includes/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#9 /opt/unetlab/html/includes/Slim/Slim.php(1302): Slim\Middleware\PrettyExceptions->call()
#10 /opt/unetlab/html/api.php(1339): Slim\Slim->run()
#11 {main}

Any idea?

Thanks in advance

[ecze]

you need to fix permissions....

E.

[mike]

and clean the browsers cache - very important