SelectedTab cannot be set before the pane has been added to a panes collection

Question

I am running SDL Trados Studio 2019 SR2 &ndash; 15.2.8.3007 on a Window 10 Pro Version 22H2 desktop 
 Today when I tried to open a file to translate, I received two identical Error pop-up windows with the following message: SelectedTab cannot be set before the pane has been added to a panes collection 
 When I close the error windows the file I open also closes. 
 I searched the knowledge base and tried all the workarounds without any success, including Reset Window Layout, renaming the files in &hellip;AppData/Roaming and &hellip;AppData/Local etc. I also did a complete uninstall and reinstall, but no luck. 
 The only difference from my routine was installing the most recent Microsoft Windows updates KB5027215, KB5027117 and Servicing Stack 10.0.19041.3205 on 11 July 2023. 
 I tried to uninstall the MS updates. Did so for the KBxxxxxxx, but Servicing Stack would not allow uninstallation. Unistalling the KBxxxxxxx updates did not help. 
 Any help would be appreciated. 
 Barsam

Paul · Answer

Barsam Marasli 
 Barsam Marasli said: It seems like this error has been around for years w/o a good solution. 
 You're using 2019 which is not supported. So if this is a problem with Studio a solution would have hopefully been added to 2021 or 2022. But I'm not familiar with this issue so have no idea how long it's been round. It certainly won't ever be fixed in 2019. 
 Barsam Marasli said: Also, what would you suggest me do until Microsoft solves this issue (if the issue is indeed with Microsoft)? 
 If it's with Microsoft there is nothing we can do... you could try the trial version of 2022 and see if that's any better? 
 But I suggest you do a proper reset first just in case it is something you can resolve yourself. 
 To do this just close Trados Studio and then rename this folder: 
 c:\Users\%username%\AppData\Roaming\SDL\SDL Trados Studio\15.0.0.0\ 
 to c:\Users\%username%\AppData\Roaming\SDL\SDL Trados Studio\15.0.0.0_old\ 
 
 Then restart Trados Studio and see if that helped.

Trados Studio > 1. Trados Studio

SelectedTab cannot be set before the pane has been added to a panes collection