Sometimes things break! To help you and our support team solve the problem debug logs are very helpful.
<aside> <img src="/icons/info-alternate_gray.svg" alt="/icons/info-alternate_gray.svg" width="40px" /> This guide shows how you can access your debug logs for the Minecraft Launcher. If you are experiencing issues with World Hosting we ask that both you and your friend follow this guide.
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Installations
tab...
JVM Arguments
field, add -Dessential.debuglog=debug
at the beginning. Ensure there's a space between this argument and the next
It should appear like: -Dessential.debuglog=debug -Xmx2G...