PC Game Server, Login and Connection Checks

For PC players who can reach the lobby but cannot find a match, wait longer with friends, or can enter standard maps but not maps with conditions.

For players unable to access Deep of Night. A missing mode and not encountering DLC bosses or terrain during an expedition need different checks.

For failures at login or when moving from the lobby into a match. An application that crashes at launch, or latency only after a match begins, needs a different investigation.

For players who can enter matches but see delayed movement or actions. Record low FPS separately rather than assuming that all stuttering is a network problem.

For a persistent login wait, network timeout, account-linking problem or missing character after signing in on Windows PC.

Use this when Windows 11 time synchronization itself fails while checking ST-3100001. If synchronization succeeded but the game still disconnects, use the connection guide instead.

For ST-3100001 or disconnections in ACE COMBAT ONLINE after confirming successful Windows time synchronization. A closing game application and failed Windows synchronization need different checks.

For Apex on PC disconnecting or failing to join a match with code:net or code:leaf. A game process closing is a separate crash symptom.

For the owner or authorized administrator of a Windows dedicated server whose configuration is missing or whose changes do not apply.

For the owner or authorized administrator of a Palworld dedicated server. This covers backing up the server world and player files, not copying a client save or migrating a local co-op host.

For an authorized server administrator changing the listening port or investigating a server reachable locally but unavailable from outside the network.

For stalled queues, connection errors, unexpected disconnects, missing server entries or lost access through a family member’s library.

For login blocks, slow queues, historical early-access entitlement issues or disconnects on Steam/PURPLE.

For party-join failures, cross-play problems, Microsoft sign-in blocks or a missing Hero Cape.

For the Steam version of ACE COMBAT ONLINE showing ST-3100001 during play or deployment and preventing you from continuing. The official notice history below was reviewed on October 18, 2026 (JST); announcement dates and procedure updates are shown separately.