Studio Error: exception while signaling: Can not call server, client is present.

I get this error after a “failed” playtest, where the character dosent load and the scripts dosent run, Ive also noticed other assets from UI arent present, I could guess tools from StarterPack wont load either, I installed Roblox Studio Mod Manager a few days ago but all the flags are disabled

Expected behavior

I expect the scripts to run, both server scripts and local scripts to run and my character to load in

A private message is associated with this bug report

Hey, you’re using an unreleased version with an unknown set of flags. All bets are off. Can you retry with a production version/production flags?

If you still are experiencing this issue, it is because of a plugin.
I and a few others have experienced this exact situation, each time it was due to plugins.
The failed play tests and the error are from a plugin.
Most likely a studio update broke the plugin, not a malicious act.

Just disable your plugins, then only enable trusted and up to date plugins.

I know some explorer plugins such as jexploerer do this.

Closing for now, please reopen if you’ve reproduced on a production build and still seeing the issue.