Resource Monitor Could Not Be Loaded: Packfile Could Not Be Opened: Invalid Magic?

Users are experiencing issues when trying to join a FiveM server with the resource Police, resulting in the error message “Couldn’t load resource: Failed to open packfile”. There is no clear solution, but some suggest degrading FiveM artifacts or deleting cache files. Zua explains how to fix this common problem in FiveM resources and shares a solution on Discord.

One user reported an error when trying to load into their FiveM server, showing different script names and invalid magic code. This error is a generic error for when server resources cannot be loaded, and there are various causes and different errors. A contributor suggests it is a curl issue and advises to post a verification of game files.

A user asked for help with a FiveM server that couldn’t be connected to, but others can. The error message was “Couldn’t load resource sessionmanager. Failed to open packfile: (solved)” and the user was creating a resource pack to add custom models to some items. They tried to delete their entire cache and even FiveM, but they still got this error.

The error is caused by the curl command failing rather than the gzip command. To fix the Couldn’t Load Resource Sessionmanager error, log in to your Game Panel and click the Run RCon Command button. Some messages in this document are accompanied by error codes or additional messages that explain the problem further.