Participant

P: Invalid Type Conversion when using Stacked Panel Groups

Forum|Forum|25 days ago
July 2, 2026
返信数 3.
86 ビュー

Issue: I receive error “Invalid type conversion” any time I change a panel’s group settings to stacked. If stacked group panels have been saved as part of a custom workspace layout, some panels display a name of “UXP Panel #” rather than the panel’s name upon opening the project (the panel name does correct itself once actively selected).

Steps to Reproduce: Toggle on “Stacked Panel Group” in the panel group settings of any panel to receive error message. Open project with stacked panel groups active to see the “UXP Panel #” name for some panels.

Premiere Version: 26.3.0 (Build 93)

Operating System: macOS, Tahoe 26.5.1

Amy the Stuv

Community Manager

Hello @yogapryg ,

This looks like an issues we might be working on. I may merge together, but first I need to know what your chip is. M1? M2? This could help us identify what’s causing this issue.

To confirm, are you saying the UXP Panel 1 is a blank panel or when you click on it does it become Stock or Text, etc?

Here is the like issue:

Thank you for bringing this to our attention.

Amy

Y

yogapryg

Participant

Hi Amy,

Thank you for looking into this. To answer your questions:

Device: Apple M1
Issue Description: Whenever I create a new project or open an existing one, a panel named "UXP Panel 1" pops up. However, the panel is completely blank/empty. The panel should display text or its standard options. I have tried clicking inside the panel, but there is no response or change whatsoever. It just stays blank.

Let me know if you need any more information!

Y

yogapryg

Participant

Hi Adobe Team,

Ever since I updated to the latest version of Premiere Pro (v26.3), I have been experiencing a recurring bug. Every time I open an existing project or create a new one, I receive an error message in the Events panel saying "Invalid type conversion." > Simultaneously, a blank panel named "UXP Panel 1" appears on my workspace (as seen in the attached screenshot). This issue did not happen in the previous versions.

System Info:

Premiere Pro version: 26.3 (Latest Update)
Operating System: macOS Sonoma

Steps to Reproduce:

Update Adobe Premiere Pro to v26.3.
Launch the application.
Open any existing project OR create a brand new project.
The Events panel automatically pops up showing the "Invalid type conversion" error.
A blank "UXP Panel 1" is visible in the UI.

Expected Behavior: The project should open smoothly without triggering random UXP panel errors or event warnings, just like it did in previous versions.

I have attached a screenshot of my workspace showing the Events panel and the blank UXP panel for your reference. Any help to resolve this would be appreciated. Thank you!

Amy the Stuv

Community Manager

Hi @lando_edits

Welcome to the Premiere forums. Thank you for your bug report. I could use a little more information to try and understand the issue. I’m looking for a pattern with the panels that become “UXP Panel #” as this can help us narrow down the source of this error. Are any of them panels from 3rd party plugins or custom panels or does it appear random?

We would also appreciate information regarding your Chip for your Mac and is it an iMac? Mac Mini? M4 Max or Ultra? M5? etc

Thank you,

Amy

L

lando_edits作成者

Participant

Thank you, @Amy the Stuv. The panels affected with the “UXP Panel #” are native, with the Text and Adobe Stock panels appearing to be affected most frequently. Although I didn’t mention in my original post, I also am unable to Edit Guides with a specific pixel value or percentage, which I have seen others mention in recent posts.

I’m experiencing the same issues on two different computers:

Mac Studio with M1 Max chip; macOS Tahoe 26.5.1
MacBook Pro with M2 Pro chip; macOS Tahoe 26.5

Thank you

Amy the Stuv

Community Manager

Thank you @lando_edits

This definitely shouldn’t be happening. I couldn’t replicate it on my M4 Max chip with a new project. I’m wondering if it’s possible for you to share a project file, no media, where this is happening in?

The Edit Guides unfortunately is a bug we are looking into, see this for a workaround, you could also revert back to 26.2.2 to use the Guides but I would suggest utilizing temporary graphic shapes and anchors / position in the meantime, or zoom in and manually drag vertical guides for more accuracy. For Horizontal guides, you will need to use the shapes until we fix this.

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