'Error, (in HelpTools:-HelpCallUI) help database' Message When Starting Maple on Windows

The message

Error, (in HelpTools:-HelpCall) help database 'C:\Users\%username%\AppData\Roaming\Maple\2020\tasks.help' does not exist

might occur when either the Maple or user folder path contains non-English characters.

Please try the following:

Open the file

C:\Program Files\Maple 2020\bin.X86_64_WINDOWS\maplelauncher.l4j.ini

in a text editor.

Insert the following line, or make any necessary amendments (remove "# ", space included, from the existing language setting and change the value):
```
-Duser.language=en
```
Save the file, and then test Maple.

If you've previously had the Gym Package installed on an old version of Maple it may also help to delete the old

 'C:\Users\%username%\AppData\Roaming\Maple\2019\tasks.help'

file.