You have to locate the directory where you installed IdeaSpaceVR.
Then edit the file config/app.php and at the bottom of the file you will find a config parameter: 'disable_forgot_password' => true. Set this to false and save the file.
Open a web browser and go to your IdeaSpaceVR login page, for example yourdomain.com/login. You will find a reset password link there. Click on the link and follow the instructions.
Once your password is reset, make sure to disable the reset password link in the config/app.php file again by setting it to true.