[Bug] Error with matrix fields on multi-site when managing the blocks on a per-site basis.

[connor-baer]

Description

I believe I have found a bug with matrix fields in Globals when using multiple sites and managing the blocks on a per-site basis.

Steps to reproduce

Tested on a fresh Craft3 install.

1. Create two or more sites in Craft3.
2. Add a Global Set that contains a matrix field.
3. Check "Manage blocks on a per-site basis" for the matrix field.
4. Navigate to the Globals and simply click save. (If that works, try editing the matrix block or switch sites).
5. Voilà:

   Internal Server Error Attempting to save an element in an unsupported site.

Additional info

• Craft version: Craft Personal 3.0.0-beta.7
• PHP version: 7.1.0
• Database driver & version: MySQL 5.6.34
• Plugins & versions: none

[connor-baer]

I just discovered that this also happens with normal Entries, not just Global Sets. Same error message:

Internal Server Error Attempting to save an element in an unsupported site.

Am I doing something wrong/missing something? This is my setup:

• Body matrix field set to Manage blocks on a per-site basis
• Fields within the blocks of the matrix are sometimes set to be translatable, sometimes not (maybe that's causing the error?)

[brandonkelly]

Looks like this was fixed by 40e8ff9f6a1ddc81fec5ed84595344fc26767e08

[connor-baer]

Just updated to beta 8 and tried again. I can confirm that it works now. Thanks! 🙌