Problem Creating "New SubFolder" and "New Folder"

Hi, I have been using Thunderbird as my preferred email client since around 2004 on Linux, macOS and Windows. I am current running Thunderbird 150.0.2 64-bit on macOS Tahoe 26.5 ( Intel ). When I attempt to create a new 'Folder' or 'Sub Folder' on either an iMAP account or, more importantly, my 'Local Folder' the displayed dialogue box is sized incorrectly and I am unable to complete the action. Specifically I can type into the 'Name' text box and see the 'Create as a subfolder of" drop down dialogue but the two buttons below are barely visible and I cannot select either with my mouse. Nor can I resize the dialogue box itself [ make larger ] to enable to be select either button. I can use the <TAB> key to cycle thorough the various items and the <RETURN> key to select an option. I have attached a sample image of the issue. Thanks.