Issues with blocklab CSS injection

[Zyles]

Describe the bug

Not sure if Oxygen is the culprit here but I believe it is.

Using the BlockLab plugin which works well with Oxygen despite not having a theme. You save your blocks in a directory called /fake/blocks/

Now I am not sure if blocklab or oxygen is the one adding the fake part of the URL, but if it is then Oxygen is causing problems.

If you want to inject a custom CSS for your block you create a CSS file named the same as the block:
/fake/blocks/my-block.php and /fake/blocks/my-block.css

According to this blog post: https://getblocklab.com/new-feature-a-better-way-of-handling-block-styling-css/

The problem when doing this is when Oxygen injects the CSS in the footer it does not append a '/' after the site URL, so the CSS stylesheet will 404:

<link rel='stylesheet' id='block-lab__block-myblock-css' href='https://example.comfake/blocks/block-myblock.css?ver=1.0.0' type='text/css' media='all' />

Notice the example.comfake part.

Are you able to replicate the issue on a Sandbox install at https://oxygenbuilder.com/try?

Yes

To Reproduce

1. Install Block Lab plugin
2. Create a new block
3. Create a PHP file for the block in /fake/blocks/myblock.php
4. Create a CSS file for the block in /fake/blocks/myblock.css

Expected behavior

Inject CSS with / after the domain name to access the CSS file.

What actually happens

Injecting without slash and CSS file will 404.

[Zyles]

Seems to be a Blocklab issue.