Problem with test client

There were some bugs found in MCreator 1.9.1 so we decided to release a patch update. If you are having one of the following bugs or want to have the features added in this path and downloaded MCreator before the time of the patch (30. 9. 2019, 15:45 CEST), consider reinstalling version 1.9.1:

• [Bugfix #53239] Mods did not contain any mod elements if they were located in a path or had a name containing any special character or whitespace
• [Bugfix #53401] Mod dependencies did not work
• [Bugfix #53439] Existing buttons in GUI editor could not be resized
• [Bugfix #53287] MCreator could get extremely laggy with large console tab contents
• [Bugfix] Duplicate mod element button did not work for some mod element types
• [Bugfix] Custom blocks and items had logWood selected for ore dictionary by default
• Added ore dictionary to plants
• Added option to disable harvest level specification for blocks
• Improved mob spawning in custom dimensions
• Added template manager to preferences
• Instead of default UI background images, custom images and mod screenshots can be used

To apply the patch (fix these bugs and get the listed features), download MCreator 1.9.1 again and install it over the current installation. After reinstalling it, make sure to regenerate code in all the workspaces you already opened with MCreator 1.9.1 by clicking Build & run -> Regenerate code and build.

After you install update (you claim you already did), do the following: 

After reinstalling it, make sure to regenerate code in all the workspaces you already opened with MCreator 1.9.1 by clicking Build & run -> Regenerate code and build.

Did you redownload and reinstall or just reinstall?

In such case, zip your workspace folder, open a support ticket, attach the workspace zip there and link to this topic.