# Power Grid 1.8.3 issues

**URL:** <https://forums.realmacsoftware.com/t/power-grid-1-8-3-issues/46203>\
**Category:** RapidWeaver Classic\
**Created:** [February 7, 2025, 1:39pm UTC](https://forums.realmacsoftware.com/t/power-grid-1-8-3-issues/46203 "2025-02-07T13:39:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![42Abbeville](https://avatars.discourse-cdn.com/v4/letter/4/ee59a6/32.png) [@42Abbeville](https://forums.realmacsoftware.com/u/42Abbeville)\
**Post date:** [February 7, 2025, 1:39pm UTC](https://forums.realmacsoftware.com/t/power-grid-1-8-3-issues/46203/1 "2025-02-07T13:39:36Z")

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Hi - Its really not my morning 🙂

Just purchased and installed PowerGrid 1.8.3 - Demo file that comes with it runs well enough

Rapidweaver 9.3.4

In my own Foundation 6 page, I’m getting “Unable to load PowerGrid preview libraries” when previewing. Additionally and I’m assuming it’s related - if I turn on Markdown - I get the following.

**Fatal error: Uncaught Error: Class ‘Michelf\Markdown’ not found in /Users/babs/Library/Containers/com.realmacsoftware.rapidweaver8/Data/tmp/RapidWeaverClassic/747/document-0x7fae2cda22b0/RWDocumentPagePreview/rw\_common/plugins/stacks/powergrid.php:204 Stack trace: #0 /Users/babs/Library/Containers/com.realmacsoftware.rapidweaver8/Data/tmp/RapidWeaverClassic/747/document-0x7fae2cda22b0/RWDocumentPagePreview/page-4/index.php(102): build\_table(‘Title,Location,…’, 1, 1, 1, ‘,’) #1 /Applications/** [**RapidWeaver.app/Contents/Resources/RWWebServerLaunch.php(175)**](http://rapidweaver.app/Contents/Resources/RWWebServerLaunch.php(175))**: include(‘/Users/babs/Lib…’) #2 {main} thrown in /Users/babs/Library/Containers/com.realmacsoftware.rapidweaver8/Data/tmp/RapidWeaverClassic/747/document-0x7fae2cda22b0/RWDocumentPagePreview/rw\_common/plugins/stacks/powergrid.php on line 204**

As I mentioned above, the demo file loads and displays perfectly - so … I’m missing something here 🙂

Any advice would be appreciated

Mark

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**Author:** ![differentdan](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/differentdan/32/33530_2.png) [@differentdan](https://forums.realmacsoftware.com/u/differentdan)\
**Post date:** [February 10, 2025, 12:04pm UTC](https://forums.realmacsoftware.com/t/power-grid-1-8-3-issues/46203/2 "2025-02-10T12:04:11Z")

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HI @42Abbeville,

Did you try reaching out to the stack’s developer? He’d be the one to check and diagnose that error message.

You could try restarting RapidWeaver because I noticed `RWWebServerLaunch.php(175):` in that error and anytime I see that it usually indicates the internal web server needs to be restarted, so usually a RapidWeaver restart can clear that, but in this context I’m not sure because of the surrounding error.

Anyway let us know how you get on.