Anki version：25.09rc1
Platform：Windows 11
Problem：After installing Anki with the new installer, the gear icon on the interface cannot be displayed properly. Details are shown in the figure below.
At the same time, the icons on the review heatmap plugin also cannot be displayed properly.
Could be a Qt issue, but at the very least, try the things on the Troubleshooting Checklist – Troubleshooting - Anki Manual – even the things you think aren’t related, so we ca rule them out.
Thank you for your reply 
. I tried each item on the Troubleshooting Checklist one by one, especially the Video Driver option, but the problem still persists. So I reinstalled version 24.11 (anki-24.11-windows-qt6.exe), which didn’t have this issue before, but now the problem has occurred. I also performed a clean installation of Anki, but the problem still persists. 
If I use the plugin
“Custom Background Image and Gear Icon” to replace the original gear icon, the replaced icon can display normally.
Yes, the problem also occurs in 25.07.5. My username does not contain any other letters. I have tried deleting the add-ons and performing a fresh installation on my computer, but the problem still persists.Is it because of my other Python environments? Does Anki have login logs? I couldn’t find them.
I noticed that when using the "Custom Background Image and Gear Icon” plugin to replace the gear, selecting an image in SVG format also results in a display error. Could this be an issue with my driver?
You could check the console output to see if it reveals anything:
You could also try the web inspector in Chrome to check the network tab. Debugging - Writing Anki Add-ons
Thank you for your reply🙏. When I launched it using the “anki-console.exe”, I found that there was some output.
conf key heatmap should be fetched with col.get_config(), and saved with col.set_config()conf key heatmap should be fetched with col.get_config(), and saved with col.set_config()conf key heatmap should be fetched with col.get_config(), and saved with col.set_config()Qt warning: QPainter::begin: Paint device returned engine == 0, type: 3Qt warning: QPainter::setCompositionMode: Painter not activeQt warning: QPainter::fillRect: Painter not activeQt warning: QPainter::setCompositionMode: Painter not activeQt warning: QPainter::setBrush: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter::drawPath: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter::setFont: Painter not activeQt warning: QPainter::setFont: Painter not activeQt warning: QPainter::setBrush: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter::setBrush: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter::setBrush: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter::setPen: Painter not activeQt warning: QPainter: Painter not active, abortedNot found: 1210908941\web\css\55\webview.cssNot found: 1210908941\user_files\css\custom_webview.cssNot found: 1210908941\web\css\55\toolbar.cssNot found: 1210908941\web\css\55\toolbar-bottom.cssNot found: 1210908941\web\css\55\webview.cssNot found: 1210908941\web\css\55\toolbar.css
Thank you all for your help. I found the problem. It was due to a mimes settings issue. I referred to the method in this post “Anki is unable to display any SVG images on my computer” and it was fixed.
Thanks for letting us know. The next update should handle this automatically.