When posting in a public forum, you should make certain that you post to the correct category.
Questions about LAMMPS should go to one of the LAMMPS categories. You post has nothing to do with the Materials Project. I have noticed your post by accident and will this time send it to the proper category, but don’t expect that to happen in the future.
For posting about LAMMPS you should first study Please Read This First: Guidelines and Suggestions for posting LAMMPS questions
The error you report is one of the most frequently reported errors and thus there is a ton of available information from previous discussion and the LAMMPS manual (5.2. Errors and warnings details — LAMMPS documentation). You should study this first before posting and then - if your problem persists or is different from the discussed cases - explain why you think so and point out where it is different.