Hello, Daisuke Tanaka!
There isn't a length limit, but it is recommended that the password is at least 12 characters long.
Thank you.
I tried disabling source code protection in the settings, and also tried disabling asset encryption, but it still didn’t work.
As a result, I used the old version’s encryption method, but do I need to identify the plugins that are not working in order to fix this?
Or should I wait for an update to the tool… It’s a bit frustrating that I can’t use the latest version.
The only way to check is if any plugin tries to pull the name dynamically (via document.src). It's pretty easy to check with a code editor like Visual Studio Code. The fix there is simply to change the line to PluginManager.parameters('<name of plugin here>'); I am working on improving the test build option so it's a lot easier to use.
If you need the previous version, I'll send it via email as soon as possible. If you use the itchio app, you can also change over to the older release by clicking the cog (when viewing the page for the tool or, in the Library menu, right click on the tool and click on Manage) -> Manage -> Change to another version -> select any of the 5.x.y versions.