No such export eventName in resource qs-inventory

Big problem with a very simple solution! This case occurs due to the start order of the resources in your server.cfg, first es_extended or qb-core, then qs-inventory pack and then the other scripts. If you still have problems, then your startup server.cfg is messed up.

If you have doubts about how to do it, step 4 of Installation is very well explained, follow it completely and you will solve it permanently.