Steps to reproduce:

• ensure braille is tethered to focus
• ensure that settings => composition only plain text is in use
• ensure that in thunderbird account settings => composition & addressing compose messages in html format is not checked
• open thunderbird write message window
• write something and press enter so that you are on blank line
• press "next line" button on braille display

Actual behavior:

error executing script.

Expected behavior:

no error.

NVDA logs, crash dumps and other attachments:

loglines.txt

System configuration

NVDA installed/portable/running from source:

running from source

NVDA version:

Windows version:

windows 10 22h2

Name and version of other software in use when reproducing the issue:

thunderbird 115.11.0 64-bit

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

If NVDA add-ons are disabled, is your problem still occurring?

yes

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?