[3.x]: Uncaught TypeError: Cannot read properties of undefined (reading 'on') Matrix Blocks

[jamesmacwhite]

What happened?

Description

Since updating to 3.8.10.2 I am unable to click on block within a matrix field which has several types, but not enough to display the add a block menu.

Uncaught TypeError: Cannot read properties of undefined (reading 'on')
at s.constructor.init (MatrixInput.js:122:36)
at s.constructor.constructor (Base.js:20:15)
at s.constructor (Base.js:32:21)
at new s.constructor (Base.js:32:21)
at HTMLDocument. (922094-restaurant:2091:19)
at l (jquery.js?v=1684142192:2:30361)
at c (jquery.js?v=1684142192:2:30663)

The following JS console error is raised upon clicking on any block.

This seems related to #13177 but the reverse problem.

Steps to reproduce

1. Update to Craft CMS 3.8.10.2
2. Try and click on a block on a matrix field with several options
3. The block is not added and a JavaScript console error is raised

None of these blocks work in a site.

If a matrix field has many blocks which displays the "Add a block" menu, this works.

Expected behavior

To be able to add a block from any Matrix field.

Actual behavior

No matrix block can be added

Craft CMS version

3.8.10.2

PHP version

8.0

Operating system and version

WSL2 Ubuntu Linux

Database type and version

MySQL 8

Image driver and version

No response

Installed plugins and versions

No response

[i-just]

Hi, thanks for reaching out. I can’t seem to replicate this behaviour on a clean Craft 3.8.10.2 installation.
Any chance you can check if it also happens when all your plugins are disabled? If so, can you please send over your composer files and config/project directory to support@craftcms.com so we can investigate further?

[jamesmacwhite]

@i-just. Thanks, I've just sent over our composer.json and config/project contents.

[i-just]

@jamesmacwhite, thanks for sending over the files; I can now reproduce it on a clean Craft 3 installation.
It’s only happening if you have (at least) 2 matrix fields on a page, and the first one only has one block and the min and max blocks for this field are both set to 1. I’m looking into it now.

[jamesmacwhite]

Ah good find! I'm glad you could reproduce this because I was going crazy!

[jamesmacwhite]

@i-just Thanks for the quick PR on this. As this has unfortunately gone onto our production environment, do we have an estimate of a new point release?

[brandonkelly]

The PR is merged in. We’ll get a release out shortly!

[jamesmacwhite]

Amazing, thank you for rapid response and release.

[brandonkelly]

Craft 3.8.11 is out with the fix :)

[jamesmacwhite]

Awesome, thank you